Players / Player profile
AZ · SS

Geraldo Perdomo

Age 27 B/T S/R 6′2″, 210 lb Dominican Republic MLB debut 2021
40-man
  • Arizona’s roster as it stands starts at SS · 599 PA · 4.7 WAR in the role
  • Trade read Unlikely to be traded: A star (4.6 projected WAR): clubs move players like this only in a full rebuild, usually in his last year of control.
xwOBA .336 wOBA .354
2026 fWAR 5.0
Projected 2027 WAR 4.6 at 612 PA · 4.7 in his 2027 role

Hitting · 2026 percentiles

vs. MLB hitters with 300+ PA · 679 PA

xwOBA .336 xwOBA: .336, 71st percentile
Swing decisions +0.98 Swing decisions: +0.98, 86th percentile
Contact value −0.47 Contact value: −0.47, 30th percentile
Bat speed 66.9 Bat speed: 66.9, 3rd percentile
Squared-up / swing 31% Squared-up / swing: 31%, 94th percentile
Blasts / swing 4% Blasts / swing: 4%, 8th percentile
EV90 100.0 EV90: 100.0, 6th percentile
Barrel % 3.1% Barrel %: 3.1%, 12th percentile
Chase % 20.8% Chase %: 20.8%, 96th percentile
Zone contact 92.7% Zone contact: 92.7%, 96th percentile
Strikeout % 12.7% Strikeout %: 12.7%, 94th percentile
Walk % 14.1% Walk %: 14.1%, 97th percentile

Platoon splits · swing path

By pitcher handedness

vsPAwOBAxwOBAK%BB%ChaseDecisionsContact
LHP199.358.31612%13%22%+0.75−0.72
RHP480.352.34413%15%20%+1.07−0.37
Attack angle
8.0° (49% in 5–20°)
Attack direction
−0.1°
Swing length
6.9 ft
Fast-swing rate
1%
Pull-air %
18.9%
Hard-hit %
32.1%
Slash · wRC+
.262/.370/.377 · 112

Zone map · 2026

Where he does damage, and where to pitch him

+0.3+0.7+1.3+1.4+1.3+1.4−0.1−0.4+0.4+0.4−0.1−1.2−3.1+2.6+1.1+4.7−0.5−0.8−2.3+0.7+0.8−0.1+0.5+3.1+2.3LHB

Does the most damage middle-in (+2.6 vs. league per 100; 1.2 standard errors on 89 pitches, inside the noise for the best of nine cells).

Weakest middle-middle (−3.1), but only 1.6 standard errors from average on 149 pitches: no in-zone spot to attack yet.

Runs per 100 pitches vs. an average LHB: better · worse. Catcher’s view · 1,882 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 Perdomo: bat path, contact quality and approach

SimilarityPlayerxwOBA’26 WAR’27 proj2027
56Spencer Horwitz PIT · ’97.3100.10.9Arb
53Nick Loftin KC · ’98.2961.30.7Pre-arb
52Nolan Schanuel LAA · ’02.3351.71.4Arb
52Austin Martin MIN · ’99.3010.90.8Pre-arb
51Myles Straw TOR · ’94.2970.71.0Club option $8.0M

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
SS +5.7 +13.2
2B +6.2prior +5.7
3B +6.2prior +5.7
Outs Above Average by position
SeasonPosOAARangeArm, DPRunsBatters
2026SS+16+12+1.0+13.05,802
2025SS+5+3−0.2+2.86,106
2024SS−1−1+3.3+2.33,634
20233B+1+10.0+1.0155
20232B−1−1+0.2−0.8684
2023SS+4+3+0.9+3.93,736

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 SS)
2025 · SS2026 · SS In (charging) +6+13Back 00Toward 3B line 0+6Toward 1B line −1−3vs. RHH +4+10vs. LHH 0+6

At SS in 2026, the biggest loss came toward 1B line (−3 outs): a coaching target.

Tools (percentile; arm among SSs)
Arm at SS 84.7 mph · 58th
Sprint speed 27.0 ft/s · 39th
Zone rating (Keystone expected outs)
SeasonZoneBallsOuts vs. exp.
2026SS544−20.0
2025SS547+2.9
2024SS370−1.7

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 4.6 WAR Guaranteed $9.3M
2028 4.4 WAR Guaranteed $12.3M
2029 4.2 WAR Guaranteed $14.3M
2030 3.8 WAR Club option $15.0M

Contract Studio →

ABS challenges · 2026

Baseball Savant

As batter 48% 16/33 won · +1.1 runs
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