Players / Player profile
SD · P

Yuki Matsui

Age 30 B/T L/L 5′8″, 165 lb Japan MLB debut 2024
40-man
  • San Diego’s roster as it stands late-inning relief · 56 IP · 0.1 WAR in the role
  • Injured list 2026: Left groin strain (Mar 25–May 5)
  • Trade read Available at a price: SD sits near the seller line (28% playoff odds, within a projected win of 30%); control through 2028.
Keystone Stuff 106 76th pct
2026 fWAR 0.4
Projected 2027 WAR 0.1 at 68 IP · 0.1 in his 2027 role

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 1,086 pitches

Keystone Stuff 106 Keystone Stuff: 106, 76th percentile
Keystone Location 87 Keystone Location: 87, 12th percentile
Keystone Pitching 86 Keystone Pitching: 86, 7th percentile
Run value (xRV) +0.94 Run value (xRV): +0.94, 87th percentile
Strikeout % 26.2% Strikeout %: 26.2%, 76th percentile
Walk % 13.9% Walk %: 13.9%, 6th percentile
Whiff % 33.1% Whiff %: 33.1%, 94th percentile
Chase % 31.6% Chase %: 31.6%, 63rd percentile
Fastball velo 91.9 Fastball velo: 91.9, 13th percentile
Extension 5.8 ft Extension: 5.8 ft, 6th percentile
64.0 IP1.83 ERA4.18 FIP 54° arm1 SV

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

−20−20−10−100010102020← Glove sideArm side →Rise (IVB, in) →4SSLFSSIST
LHP · arm angle 54° · how to read
PitchUseVeloIVBHBStuffLocWhiffxRV/100
Four-seam38% use38%92.019.2+4.81039022%+0.73
Slider30% use30%84.92.9−4.31129636%+1.40
Splitter26% use26%83.53.7+8.51009347%+1.15
Sinker3% use3%90.912.5+12.683339%+0.42
Sweeper3% use3%81.1−2.7−14.110010527%−2.32

No mix change or new pitch clears its bar. The arsenal is efficient for its shapes.

Most similar pitchers

Pitches like Matsui: same hand, shape, slot and mix

SimilarityPlayerStuff’26 WAR’27 proj2027
41José Suarez ATH · ’98950.60.4Free agent
40Dylan Lee ATL · ’941062.11.0Arb
39Brent Headrick NYY · ’971012.11.2Pre-arb
32Jacob Latz TEX · ’961132.21.1Arb
30Carlos Rodón NYY · ’921091.81.5Signed $27.8M

Same-handed pitchers nearest on fastball velocity and shape, arm angle, extension, pitch mix, secondary shapes, Stuff, whiff rate and workload. 2026 regulars only.

Pitch locations · 2026

Where each pitch finishes, by batter side

Splitter 43%
20% zone
Four-seam 37%
47% zone
Slider 19%
37% zone

Where each pitch finishes, catcher’s view. The bar marks the batter’s side; the box is an average strike zone. Pitches with 40+ thrown to this side.

Contract & projection

Club control (RosterResource) · Keystone projected WAR

2027 0.1 WAR Guaranteed $6.5M
2028 0.0 WAR Player option $7.0M
2029 −0.1 WAR Free agent
2030 −0.3 WAR Free agent

Contract Studio →

Minor leagues

MLB Stats API · public box-score data

SeasonLevelLevelTeamAgeGPA / IPPA / IP ·Line
2026AAAAAAEl Paso Chihuahuas301112.2 IP 12.2 IP · 4.97 ERA · 23.7% K · 5.1% BB
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.