Players / Player profile
MIA · C

Joe Mack

Age 23 B/T L/R 6′0″, 210 lb USA MLB debut 2026
40-man FV 50 · #2 in org
  • Miami’s roster as it stands starts at C · 344 PA · 2.0 WAR in the role
  • Trade read Unlikely to be traded: Young, controllable regular (age 24, control through 2032): the kind of player clubs build around.
xwOBA .295 wOBA .304
2026 fWAR 2.2
Projected 2027 WAR 2.1 at 365 PA · 2.0 in his 2027 role

Hitting · 2026 percentiles

vs. MLB hitters with 300+ PA · 330 PA

xwOBA .295 xwOBA: .295, 17th percentile
Swing decisions +0.28 Swing decisions: +0.28, 58th percentile
Contact value −0.29 Contact value: −0.29, 35th percentile
Bat speed 74.1 Bat speed: 74.1, 76th percentile
Squared-up / swing 20% Squared-up / swing: 20%, 27th percentile
Blasts / swing 8% Blasts / swing: 8%, 55th percentile
EV90 103.8 EV90: 103.8, 45th percentile
Barrel % 8.4% Barrel %: 8.4%, 55th percentile
Chase % 28.1% Chase %: 28.1%, 61st percentile
Zone contact 83.1% Zone contact: 83.1%, 38th percentile
Strikeout % 24.9% Strikeout %: 24.9%, 28th percentile
Walk % 5.8% Walk %: 5.8%, 15th percentile

Platoon splits · swing path

By pitcher handedness

vsPAwOBAxwOBAK%BB%ChaseDecisionsContact
LHP68.252.24625%6%32%−0.11−2.02
RHP262.317.30725%6%27%+0.37+0.12
Attack angle
13.2° (57% in 5–20°)
Attack direction
−3.5°
Swing length
7.4 ft
Fast-swing rate
40%
Pull-air %
16.9%
Hard-hit %
38.5%
Slash · wRC+
.234/.282/.403 · 86

Zone map · 2026

Where he does damage, and where to pitch him

+0.5+1.6−2.6+1.5−1.5−1.1−0.4−0.5−1.3+2.3+0.3−2.7−0.5+7.4−0.2−0.3−1.5+1.5−1.0−0.7+0.6−0.8−2.1−1.0−0.5LHB

Does the most damage middle-in (+7.4 vs. league per 100; 3.3 standard errors above average on 60 pitches).

Weakest middle-away (−2.7), but only 1.2 standard errors from average on 91 pitches: no in-zone spot to attack yet.

Runs per 100 pitches vs. an average LHB: better · worse. Catcher’s view · 1,168 pitches · faded cells are within one standard error of average. A spot is called only when it is farther from average than the best or worst of nine average cells gets 95% of the time (set from the league’s own pitches: about 3 standard errors above, 2 below).

Most similar hitters

Swings like Mack: bat path, contact quality and approach

SimilarityPlayerxwOBA’26 WAR’27 proj2027
68Ryan McMahon NYY · ’94.2970.50.7Signed $16.0M
67J.T. Realmuto PHI · ’91.3160.70.5Signed $15.0M
62Marcell Ozuna FA · ’90.304−1.00.2Free agent
62Dylan Crews WSH · ’02.3180.90.9Pre-arb
61Logan O'Hoppe TEX · ’00.268−0.90.2Arb

Nearest neighbours on bat speed, swing length, attack angle, squared-up and blast rates, EV90, barrels, pull-air, chase, zone contact, K% and BB%. 2026 regulars only.

Fielding

2027 rating at every position he can play · OAA by position · range by direction · tools. Same engine as the Fielding Lab and the Winter Plan.

2027 rating by position · best fit first, on the total with the position’s worth
C +10.2 +22.7
1B −2.0prior −17.5
Outs Above Average by position
SeasonPosOAARangeArm, DPRunsBatters
No MLB fielding yet.

Runs = range plus his arm and double-play runs spread over his positions by outs (Fielding Run Value, from 2023): what the rating counts.

Range by direction (OAA)

No directional data (needs a qualified season at one position).

Tools (percentile among MLB fielders)
Arm strength —
Sprint speed 26.1 ft/s · 20th
Zone rating (Keystone expected outs)
SeasonZoneBallsOuts vs. exp.
Too few balls in his zone.

The zone rating counts every ball hit to his part of the field while he played there, his club’s positioning included; Savant OAA uses his actual starting spot and is the better individual grade. They agree best in the outfield. See the model card.

Compare in the Fielding Lab →

Contract & projection

Club control (RosterResource) · Keystone projected WAR

2027 2.1 WAR Pre-arb $780K*
2028 2.3 WAR Pre-arb $803K*
2029 2.3 WAR Arbitration $4.0M*
2030 2.3 WAR Arbitration $7.7M*

* projected arbitration or minimum salary. Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevelLevelTeamAgeGPA / IPPA / IP ·Line
2026AAAAAAJacksonville Jumbo Shrimp2324103 PA 103 PA · .244/.388/.378 · 3 HR · 21.4% K · 19.4% BB
2025AAAAPensacola Blue Wahoos221356 PA 56 PA · .318/.464/.614 · 3 HR · 21.4% K · 17.9% BB
2025AAAAAAJacksonville Jumbo Shrimp2299412 PA 412 PA · .250/.320/.459 · 18 HR · 27.9% K · 8.5% BB

FanGraphs: FV 50 · ETA 2026 · #58 overall. Public pitch tracking exists only at Triple-A and some Florida State League parks.

ABS challenges · 2026

Baseball Savant

As batter 50% 2/4 won · −0.1 runs
As catcher 64% 75/118 won · +2.8 runs
Keystone is an independent portfolio project. It is not affiliated with Major League Baseball or any club. Data: MLB Stats API, Baseball Savant, FanGraphs. Used under their terms for individual, non-commercial use.