Players / Player profile
BOS · LF

Jarren Duran

Age 30 B/T L/R 6′0″, 205 lb USA MLB debut 2021
40-man
  • Boston’s roster as it stands starts at CF · 562 PA · 2.8 WAR in the role
  • Trade read Unlikely to be traded: BOS expects to contend (76% playoff odds) and he’s a regular.
xwOBA .306 wOBA .282
2026 fWAR 0.5
Projected 2027 WAR 2.3 at 574 PA · 2.8 in his 2027 role

Hitting · 2026 percentiles

vs. MLB hitters with 300+ PA · 609 PA

xwOBA .306 xwOBA: .306, 30th percentile
Swing decisions −0.72 Swing decisions: −0.72, 17th percentile
Contact value 0.00 Contact value: 0.00, 47th percentile
Bat speed 75.0 Bat speed: 75.0, 86th percentile
Squared-up / swing 17% Squared-up / swing: 17%, 9th percentile
Blasts / swing 9% Blasts / swing: 9%, 65th percentile
EV90 106.6 EV90: 106.6, 82nd percentile
Barrel % 9.2% Barrel %: 9.2%, 62nd percentile
Chase % 34.4% Chase %: 34.4%, 23rd percentile
Zone contact 80.6% Zone contact: 80.6%, 21st percentile
Strikeout % 27.1% Strikeout %: 27.1%, 17th percentile
Walk % 6.2% Walk %: 6.2%, 17th percentile

Platoon splits · swing path

By pitcher handedness

vsPAwOBAxwOBAK%BB%ChaseDecisionsContact
LHP142.299.33324%8%32%−0.48+1.23
RHP467.277.29828%6%35%−0.79−0.36
Attack angle
5.9° (43% in 5–20°)
Attack direction
−2.2°
Swing length
7.6 ft
Fast-swing rate
46%
Pull-air %
13.9%
Hard-hit %
40.3%
Slash · wRC+
.207/.266/.361 · 69

Zone map · 2026

Where he does damage, and where to pitch him

−0.1−0.9−2.8−1.7−0.4−1.4+0.3+0.4+3.3−0.1−1.5−0.2−2.5+0.7+0.2−0.1−0.4−0.9−0.4+0.70.0−3.3−4.0−3.0−2.3LHB

Does the most damage up and in (+3.3 vs. league per 100; 1.5 standard errors on 68 pitches, inside the noise for the best of nine cells).

Weakest middle-middle (−2.5), but only 1.3 standard errors from average on 127 pitches: no in-zone spot to attack yet.

Runs per 100 pitches vs. an average LHB: better · worse. Catcher’s view · 2,007 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 Duran: bat path, contact quality and approach

SimilarityPlayerxwOBA’26 WAR’27 proj2027
71Konnor Griffin PIT · ’06.3161.41.7Signed $3.3M
69Dylan Crews WSH · ’02.3180.90.9Pre-arb
68Christian Walker HOU · ’91.3041.60.5Signed $20.0M
62Amed Rosario NYY · ’95.309−0.20.0Free agent
61Max Muncy ATH · ’02.287−0.3−0.1—

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 −2.0 +0.5
LF +2.1 −5.4
RF +0.1prior −10.4
1B +2.6prior −12.9
Outs Above Average by position
SeasonPosOAARangeArm, DPRunsBatters
2026CF00−0.1−0.1573
2026LF+5+5−0.6+4.44,384
2025RF000.00.014
2025CF+1+1+0.5+1.5814
2025LF−5−5+3.0−1.94,926
2024LF+3+3+0.9+3.92,644
2024CF+7+6+1.2+7.23,395
2023LF00−0.3−0.3725
2023CF−1−1−1.0−2.02,375

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, his 2027 spot)
2024 · CF In (charging) +2Back +1Toward 3B line +2Toward 1B line +5vs. RHH +6vs. LHH +4
Tools (percentile; arm among LFs)
Arm at LF 87.3 mph · 67th
Sprint speed 29.0 ft/s · 91st
Reaction −1.0 ft · 16th
Burst +0.6 ft · 67th
Route +0.8 ft · 92nd
Catch difficulty (latest season)
PlayMadeChancesRate
★★★★★2268%
★★★★5863%
★★★71070%
★★141688%
★1818100%
Zone rating (Keystone expected outs)
SeasonZoneBallsOuts vs. exp.
2026LF418−1.3
2026CF63−1.2
2025LF454+0.1
2025CF95+3.4
2024LF238+1.4
2024CF397+4.3

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 2.3 WAR Arbitration $7.7M*
2028 1.9 WAR Arbitration $14.1M*
2029 1.3 WAR Free agent
2030 0.6 WAR Free agent

* projected arbitration or minimum salary. Contract Studio →

ABS challenges · 2026

Baseball Savant

As batter 50% 5/10 won · +0.1 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.