Players / Player profile
BOS · DH

Mickey Gasper

Age 31 B/T S/R 5′9″, 205 lb USA MLB debut 2024
40-man
  • Boston’s roster as it stands bench · 262 PA · 0.7 WAR in the role
  • Injured list 2026: Right biceps strain (Sep 27–Sep 28)
  • Trade read Available at a price: BOS 76% playoff odds; control through 2031.
xwOBA .354 wOBA .364
2026 fWAR 0.8
Projected 2027 WAR 0.0 at 324 PA · 0.7 in his 2027 role

Hitting · 2026

225 PA: percentiles need 300+, so values only

xwOBA .354 xwOBA: .354
Swing decisions +0.20 Swing decisions: +0.20
Contact value +0.76 Contact value: +0.76
Bat speed 72.0 Bat speed: 72.0
Squared-up / swing 29% Squared-up / swing: 29%
Blasts / swing 9% Blasts / swing: 9%
EV90 103.6 EV90: 103.6
Barrel % 10.4% Barrel %: 10.4%
Chase % 21.0% Chase %: 21.0%
Zone contact 93.6% Zone contact: 93.6%
Strikeout % 17.3% Strikeout %: 17.3%
Walk % 12.0% Walk %: 12.0%

Platoon splits · swing path

By pitcher handedness

vsPAwOBAxwOBAK%BB%ChaseDecisionsContact
LHP28.152.18929%11%23%+0.18−5.45
RHP197.393.37716%12%21%+0.20+1.76
Attack angle
12.6° (59% in 5–20°)
Attack direction
−7.9°
Swing length
6.6 ft
Fast-swing rate
13%
Pull-air %
19.5%
Hard-hit %
37.7%
Slash · wRC+
.251/.357/.466 · 130

Zone map · 2026

Where he does damage, and where to pitch him

+0.5+3.3+1.9−0.4−0.6−0.2−0.1+3.5−0.7+0.6+1.2−1.8+1.4−2.8+1.2−0.50.0+1.4+1.5−1.10.0+0.5+3.6+0.3−0.1LHB

Does the most damage up over the middle (+3.5 vs. league per 100; 1.5 standard errors on 27 pitches, inside the noise for the best of nine cells).

Weakest middle-in (−2.8), but only 1.3 standard errors from average on 26 pitches: no in-zone spot to attack yet.

Runs per 100 pitches vs. an average LHB: better · worse. Catcher’s view · 671 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 Gasper: bat path, contact quality and approach

SimilarityPlayerxwOBA’26 WAR’27 proj2027
50Trent Grisham NYY · ’96.3380.71.2Free agent
48Kevin McGonigle DET · ’04.3575.44.2Signed $2.8M
46Will Smith LAD · ’95.3891.72.2Signed $16.0M
46Adley Rutschman BOS · ’98.3273.01.9Arb
43Lars Nootbaar AZ · ’97.3461.00.9Arb

Trent Grisham (similarity 50, 1.2 WAR projected for 2027) is a free agent this winter: a similar swing available without trading talent, at a free agent’s price. Opportunity Finder →

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 −5.4 +7.1
1B −3.1 −15.6
Outs Above Average by position
SeasonPosOAARangeArm, DPRunsBatters
20261B−1−1−0.3−1.3361
2025LF000.00.016
20252B−1−1+0.1−0.953
20251B00+0.3+0.396
20241B000.00.011
20242B00−0.2−0.2129

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 at 1B)
2026 · 1B In (charging) 0Back 0Toward 3B line −1Toward 1B line 0vs. RHH 0vs. LHH −1
Tools (percentile among MLB fielders)
Arm strength —
Sprint speed 26.7 ft/s · 32nd
Catch difficulty (latest season)
PlayMadeChancesRate
★★★★★00—
★★★★00—
★★★00—
★★11100%
★00—
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 0.0 WAR Pre-arb $780K*
2028 −0.3 WAR Pre-arb $803K*
2029 −0.7 WAR Arbitration $1.2M*
2030 −1.0 WAR Arbitration $1.3M*

* projected arbitration or minimum salary. Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevelLevelTeamAgeGPA / IPPA / IP ·Line
2026AAAAAAWorcester Red Sox3054242 PA 242 PA · .337/.450/.566 · 9 HR · 16.1% K · 17.4% BB
2025AAAAAASt. Paul Saints2947208 PA 208 PA · .285/.385/.531 · 10 HR · 18.3% K · 12.0% BB

ABS challenges · 2026

Baseball Savant

As batter 50% 3/6 won · −0.1 runs
As catcher 73% 8/11 won · −0.7 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.