Player development / Development Tracker
Development Tracker
Keystone Development plan MLB

Paul Skenes

Pitcher· 2027: rotation · data through Sep 27, 2026 · each goal names its check

  1. 1
    medium ask Work your four-seamer back toward 98.2 mph.

    Why You averaged 98.2 mph in 2025 and 96.8 this year: more of a drop than age alone explains.

    How we’ll know Your four-seamer velocity in your first starts or outings, and 98.2 mph or better by the 2027 All-Star break.

    Velocity already shown in an earlier season, but the cause has to be found first; it may not come back.

    Staff response
  2. 2
    high ask Work back toward your 2025 splitter (2″ more drop).

    Why That version graded about 7 points better than this year’s on the same model, from the same arm.

    How we’ll know Tracked movement on your splitter in spring, back near its 2025 shape.

    A feel change on a pitch already thrown before; needs video and a coach’s eye, and may not come back.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/694973
Keystone Development plan MLB

Oneil Cruz

CF· 2027: lineup · data through Sep 27, 2026 · each goal names its check

  1. 1
    low ask Work with the staff to find out why your bat speed dropped.

    Why This dropped by more than noise in 2026, and the cause should be known before anyone sets a target.

    How we’ll know A cause identified (video, medical, pitch shape) by spring training.

    Video, medical and pitch-shape checks before anyone sets a target.

    Staff response
  2. 2
    medium ask Attack hittable pitches.

    Why Your hittable-pitch take rate is 38%. With no change it would likely be about 36% next year anyway; the target, 34%, beats that.

    How we’ll know Hittable-pitch take rate at or under 34% by the end of the 2027 season.

    A plan for which pitches to take; it sticks when it’s specific to pitch types and counts.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/665833
Keystone Development plan MLB · Triple-A · Bradenton

Konnor Griffin

SS· 2027: lineup · data through Sep 27, 2026 · each goal names its check

  1. 1
    medium ask Swing less at pitches out of the zone.

    Why Your chase rate is 38%. With no change it would likely be about 37% next year anyway; the target, 34%, beats that.

    How we’ll know Chase rate at or under 34% by the end of the 2027 season.

    A plan for which pitches to take; it sticks when it’s specific to pitch types and counts.

    Staff response
  2. 2
    low ask Check in with the medical staff on the right elbow strain before your winter program.

    Why You came back and played 30 games after it, so it doesn’t hold up the rest of this plan.

    How we’ll know A note from the medical staff before the program starts.

    A check-in with the medical staff; it doesn’t hold up the plan.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/804606
Keystone Development plan MLB · Triple-A · Bradenton

Jared Jones

Pitcher· 2027: rotation · data through Sep 27, 2026 · each goal names its check

  1. 1
    high ask Work back toward your 2024 four-seamer (2″ more ride).

    Why That version graded about 5 points better than this year’s on the same model, from the same arm.

    How we’ll know Tracked movement on your four-seamer in spring, back near its 2024 shape.

    A feel change on a pitch already thrown before; needs video and a coach’s eye, and may not come back.

    Staff response
  2. 2
    low ask Check in with the medical staff on the right elbow ucl sprain (carried over from 2025; no reason given) before your winter program.

    Why You came back and played 20 games after it, so it doesn’t hold up the rest of this plan.

    How we’ll know A note from the medical staff before the program starts.

    A check-in with the medical staff; it doesn’t hold up the plan.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/683003
Keystone Development plan MLB · Triple-A

Esmerlyn Valdez

RF· 2027: lineup · data through Sep 27, 2026 · each goal names its check

  1. 1
    medical first Get medical clearance before starting anything else on this plan.

    Why Left hamstring strain put you on the injured list, and you played 0 games after it.

    How we’ll know Cleared by the medical staff, then the rest of the plan starts.

    Medical clearance comes before any of the work.

    Staff response
  2. 2
    high ask After medical clearance: make more contact on strikes.

    Why Your zone contact is 67%. With no change it would likely be about 71% next year anyway; the target, 73%, beats that.

    How we’ll know Zone contact at or over 73% by the end of the 2027 season.

    Contact skill changes slowly; expect small gains.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/699013
Keystone Development plan MLB

Ryan O'Hearn

1B in 2027 (RF in 2026)· 2027: lineup · data through Sep 27, 2026 · each goal names its check

  1. 1
    low ask Work with the staff to find out why your bat speed dropped.

    Why This dropped by more than noise in 2026, and the cause should be known before anyone sets a target.

    How we’ll know A cause identified (video, medical, pitch shape) by spring training.

    Video, medical and pitch-shape checks before anyone sets a target.

    Staff response
  2. 2
    low ask Check in with the medical staff on the left quad strain before your winter program.

    Why You came back and played 13 games after it, so it doesn’t hold up the rest of this plan.

    How we’ll know A note from the medical staff before the program starts.

    A check-in with the medical staff; it doesn’t hold up the plan.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/656811
Keystone Development plan MLB

Mitch Keller

Pitcher· 2027: rotation · data through Sep 27, 2026 · each goal names its check

  1. 1
    medical first Get medical clearance before starting anything else on this plan.

    Why Right arm teres major muscle injury put you on the injured list and wasn’t closed out by season’s end.

    How we’ll know Cleared by the medical staff, then the rest of the plan starts.

    Medical clearance comes before any of the work.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/656605
Keystone Development plan MLB · Triple-A

Braxton Ashcraft

Pitcher· 2027: rotation · data through Sep 27, 2026 · each goal names its check

  1. 1
    medical first Get medical clearance before starting anything else on this plan.

    Why Right arm discomfort put you on the injured list, and you played 0 games after it.

    How we’ll know Cleared by the medical staff, then the rest of the plan starts.

    Medical clearance comes before any of the work.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/677952
Keystone Development plan MLB · Triple-A

Spencer Horwitz

DH in 2027 (1B in 2026)· 2027: lineup · data through Sep 27, 2026 · each goal names its check

  1. 1
    high ask Get bat speed back to your best season.

    Why Your bat speed is 68.8 mph; your own best season is 69.5 mph.

    How we’ll know Bat speed at or over 69.5 mph by the 2027 All-Star break.

    Strength and mechanics over an offseason; gains are usually small.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/687462
Keystone Development plan MLB · Triple-A

Nick Gonzales

2B in 2027 (3B in 2026)· 2027: lineup · data through Sep 27, 2026 · each goal names its check

  1. 1
    medium ask Get your reps and footwork back at second base this winter and in spring.

    Why The Winter Plan moves you to second base. Your outs above average there (−1 in 2026) beat your 2026 mark at third base (−11).

    How we’ll know Statcast outs above average at second base at zero or better by the 2027 All-Star break.

    Reps and footwork at a position he has played before; a spring-training project.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/693304
Keystone Development plan MLB · Triple-A

Bubba Chandler

Pitcher· 2027: rotation · data through Sep 27, 2026 · each goal names its check

  1. 1
    low ask Get a velocity check with the medical staff before your throwing program starts.

    Why Your fastball finished the season 1.3 mph below your average and your arm angle moved. In season, drops like this came before arm injuries more often for starters; there are too few winter cases to tell, so it’s a cheap check.

    How we’ll know Medical sign-off, then fastball velocity back near 98.4 mph.

    A quick check with the medical staff; it isn’t a forecast of injury.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/696149
Keystone Development plan MLB · Triple-A

Jake Mangum

CF· 2027: bench · data through Sep 27, 2026 · each goal names its check

  1. 1
    medium ask Swing less at pitches out of the zone.

    Why Your chase rate is 45%. With no change it would likely be about 44% next year anyway; the target, 41%, beats that.

    How we’ll know Chase rate at or under 41% by the end of the 2027 season.

    A plan for which pitches to take; it sticks when it’s specific to pitch types and counts.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/663968
Keystone Development plan MLB · Triple-A

Carmen Mlodzinski

Pitcher· 2027: bullpen · data through Sep 27, 2026 · each goal names its check

  1. 1
    medium ask Work your four-seamer back toward 96.1 mph.

    Why You averaged 96.1 mph in 2025 and 95.0 this year: more of a drop than age alone explains.

    How we’ll know Your four-seamer velocity in your first starts or outings, and 96.1 mph or better by the 2027 All-Star break.

    Velocity already shown in an earlier season, but the cause has to be found first; it may not come back.

    Staff response
  2. 2
    high ask Work back toward your 2025 sweeper (7″ less drop and 4″ more arm-side run).

    Why That version graded about 8 points better than this year’s on the same model, from the same arm.

    How we’ll know Tracked movement on your sweeper in spring, back near its 2025 shape.

    A feel change on a pitch already thrown before; needs video and a coach’s eye, and may not come back.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/669387
Keystone Development plan MLB

Luke Weaver

Pitcher· 2027: bullpen · data through Sep 27, 2026 · each goal names its check

  1. 1
    low ask Work with the staff to find out why your cutter velocity dropped.

    Why This dropped by more than noise in 2026, and the cause should be known before anyone sets a target.

    How we’ll know A cause identified (video, medical, pitch shape) by spring training.

    Video, medical and pitch-shape checks before anyone sets a target.

    Staff response
  2. 2
    high ask Try a sweeper (around 83 mph) in bullpens this winter.

    Why Pitchers with your arm slot and velocity throw this shape, and for you it grades better than your cutter under every version of the model; it would take some of your cutter’s usage, not replace your fastball.

    How we’ll know Whether it grades better than your cutter by the end of spring; drop it if not.

    A season-long project, and many new pitches don’t stick.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/596133
Keystone Development plan MLB · Triple-A

Evan Sisk

Pitcher· 2027: bullpen · data through Sep 27, 2026 · each goal names its check

  1. 1
    medium ask Throw more strikes, starting with your sweeper.

    Why You walked 12.7% of hitters; the target, 9.4%, beats where a walk rate like yours usually lands on its own next year (10.9%).

    How we’ll know Walk rate moving toward 9.4%. One season at your sample can’t tell a change this size from noise, so read it as a lean, not a pass-or-fail check.

    Targets and repetition in bullpens; no new pitch or shape.

    Staff response
  2. 2
    low ask Check in with the medical staff on the left elbow inflammation before your winter program.

    Why You came back and played 18 games after it, so it doesn’t hold up the rest of this plan.

    How we’ll know A note from the medical staff before the program starts.

    A check-in with the medical staff; it doesn’t hold up the plan.

    Staff response
  3. ✓
    low ask Hold onto this year’s improvement in sinker velocity (primary fastball).

    Why One of your clearest improvements this year.

    How we’ll know It holds through spring and into the season.

    Keep doing what’s working.

Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/681895
Keystone Development plan MLB · Triple-A

Jared Triolo

SS· 2027: bench · data through Sep 27, 2026 · each goal names its check

  1. 1
    high ask Get bat speed back to your best season.

    Why Your bat speed is 70.3 mph; your own best season is 71.4 mph.

    How we’ll know Bat speed at or over 71.4 mph by the 2027 All-Star break.

    Strength and mechanics over an offseason; gains are usually small.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/669707
Keystone Development plan MLB · Triple-A

Yohan Ramírez

Pitcher· 2027: bullpen · data through Sep 27, 2026 · each goal names its check

  1. 1
    medium ask Throw more strikes, starting with your curveball.

    Why You walked 12.2% of hitters; the target, 9.1%, beats where a walk rate like yours usually lands on its own next year (10.6%).

    How we’ll know Walk rate at or under 9.1% after about 411 batters faced (more than your 2026 total).

    Targets and repetition in bullpens; no new pitch or shape.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/670990
Keystone Development plan MLB · Triple-A

Isaac Mattson

Pitcher· 2027: bullpen · data through Sep 27, 2026 · each goal names its check

  1. 1
    medical first Get medical clearance before starting anything else on this plan.

    Why Right hip impingement put you on the injured list, and you played 0 games after it.

    How we’ll know Cleared by the medical staff, then the rest of the plan starts.

    Medical clearance comes before any of the work.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/676755
Keystone Development plan MLB · Triple-A

Mason Montgomery

Pitcher· 2027: bullpen · data through Sep 27, 2026 · each goal names its check

  1. 1
    low ask Work with the staff to find out why your Stuff dropped.

    Why This dropped by more than noise in 2026, and the cause should be known before anyone sets a target.

    How we’ll know A cause identified (video, medical, pitch shape) by spring training.

    Video, medical and pitch-shape checks before anyone sets a target.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/682254
Keystone Development plan MLB · Triple-A · Bradenton

Noah Murdock

Pitcher· 2027: call-up · data through Sep 27, 2026 · each goal names its check

  1. 1
    low ask Work with the staff to find out why your Stuff dropped.

    Why This dropped by more than noise in 2026, and the cause should be known before anyone sets a target.

    How we’ll know A cause identified (video, medical, pitch shape) by spring training.

    Video, medical and pitch-shape checks before anyone sets a target.

    Staff response
  2. ✓
    low ask Hold onto this year’s improvement in cutter velocity.

    Why One of your clearest improvements this year.

    How we’ll know It holds through spring and into the season.

    Keep doing what’s working.

Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/668716
Keystone Development plan MLB · Triple-A

Thomas Harrington

Pitcher· 2027: minors · data through Sep 27, 2026 · each goal names its check

  1. 1
    low ask Work with the staff to find out why your cutter velocity dropped.

    Why This dropped by more than noise in 2026, and the cause should be known before anyone sets a target.

    How we’ll know A cause identified (video, medical, pitch shape) by spring training.

    Video, medical and pitch-shape checks before anyone sets a target.

    Staff response
Ask level = how much the goal asks of the player and staff: low (a check or a game-plan change), medium (practice and targets), high (mechanics or a new pitch). Velocity and shape targets come from his own history; a new pitch is an experiment; rate targets beat where he’d likely land with no plan. keystone-baseball.com/players/802419
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