Players / Player profile
MIA · CF

Jakob Marsee

Age 25 B/T L/L 6′0″, 180 lb USA MLB debut 2025
40-man
  • Miami’s roster as it stands starts at CF · 522 PA · 2.7 WAR in the role
  • Trade read Unlikely to be traded: Young, controllable regular (age 26, control through 2031): the kind of player clubs build around.
xwOBA .319 wOBA .331
2026 fWAR 2.5
Projected 2027 WAR 2.6 at 531 PA · 2.7 in his 2027 role

Hitting · 2026 percentiles

vs. MLB hitters with 300+ PA · 616 PA

xwOBA .319 xwOBA: .319, 49th percentile
Swing decisions +0.60 Swing decisions: +0.60, 73rd percentile
Contact value −1.15 Contact value: −1.15, 12th percentile
Bat speed 69.9 Bat speed: 69.9, 23rd percentile
Squared-up / swing 25% Squared-up / swing: 25%, 73rd percentile
Blasts / swing 5% Blasts / swing: 5%, 20th percentile
EV90 101.3 EV90: 101.3, 15th percentile
Barrel % 3.8% Barrel %: 3.8%, 15th percentile
Chase % 22.2% Chase %: 22.2%, 91st percentile
Zone contact 91.9% Zone contact: 91.9%, 95th percentile
Strikeout % 20.4% Strikeout %: 20.4%, 55th percentile
Walk % 12.5% Walk %: 12.5%, 91st percentile

Platoon splits · swing path

By pitcher handedness

vsPAwOBAxwOBAK%BB%ChaseDecisionsContact
LHP148.326.30626%13%24%−0.20−0.95
RHP468.332.32319%12%22%+0.85−1.24
Attack angle
6.6° (45% in 5–20°)
Attack direction
−5.0°
Swing length
6.7 ft
Fast-swing rate
5%
Pull-air %
20.1%
Hard-hit %
34.8%
Slash · wRC+
.231/.347/.358 · 100

Zone map · 2026

Where he does damage, and where to pitch him

+0.3+0.1+3.4−1.2−0.2+1.9−2.2+0.1−1.4−2.6+1.7−1.0−2.2−4.1+0.7+0.5+2.2−0.5+2.00.0+0.8−0.3+2.9−1.0+0.5LHB

Does the most damage down and away (+2.2 vs. league per 100; 1.0 standard errors on 104 pitches, inside the noise for the best of nine cells).

Weakest middle-in (−4.1), but only 2.0 standard errors from average on 101 pitches: no in-zone spot to attack yet.

Runs per 100 pitches vs. an average LHB: better · worse. Catcher’s view · 2,217 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 Marsee: bat path, contact quality and approach

SimilarityPlayerxwOBA’26 WAR’27 proj2027
65Spencer Horwitz PIT · ’97.3100.10.9Arb
55Luke Keaschall MIN · ’02.3233.02.9Pre-arb
55TJ Friedl CIN · ’95.260−0.70.5Free agent
54Nick Loftin KC · ’98.2961.30.7Pre-arb
53Carson Kelly CHC · ’94.3101.61.7Free agent

Carson Kelly (similarity 53, 1.7 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
CF +4.4 +6.9
RF +8.2prior −2.3
LF +6.1prior −4.4
Outs Above Average by position
SeasonPosOAARangeArm, DPRunsBatters
2026CF+9+8−2.4+5.65,259
2025RF+1+10.0+1.0116
2025LF−1−1−0.1−1.1260
2025CF+4+4−0.5+3.51,680

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 CF)
2025 · CF2026 · CF In (charging) +1−1Back +1+1Toward 3B line +1+4Toward 1B line +2+5vs. RHH +1+2vs. LHH +3+7
Tools (percentile; arm among CFs)
Arm at CF 88.6 mph · 66th
Sprint speed 27.9 ft/s · 63rd
Reaction +1.5 ft · 87th
Burst +0.4 ft · 60th
Route −1.1 ft · 11th
Catch difficulty (latest season)
PlayMadeChancesRate
★★★★★32114%
★★★★3743%
★★★131681%
★★2121100%
★252793%
Zone rating (Keystone expected outs)
SeasonZoneBallsOuts vs. exp.
2026CF589−3.7
2025CF189+4.1

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 2.6 WAR Pre-arb $780K*
2028 2.6 WAR Pre-arb $803K*
2029 2.5 WAR Arbitration $4.4M*
2030 2.2 WAR Arbitration $8.9M*

* projected arbitration or minimum salary. Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevelLevelTeamAgeGPA / IPPA / IP ·Line
2025AAAAAAJacksonville Jumbo Shrimp2498429 PA 429 PA · .246/.379/.438 · 14 HR · 18.9% K · 15.9% BB

ABS challenges · 2026

Baseball Savant

As batter 62% 8/13 won · 0.0 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.