SD · P
Mason Miller
Age 28 B/T R/R 6′5″, 200 lb USA MLB debut 2023
- San Diego’s roster as it stands late-inning relief · 61 IP · 2.0 WAR in the role
- Trade read Available at a price: SD 28% playoff odds; control through 2029.
Keystone Stuff 133 100th pct
2026 fWAR 3.7
Projected 2027 WAR 2.4 at 71 IP · 2.0 in his 2027 role
Pitching · 2026 percentiles
vs. MLB pitchers with 500+ pitches · 1,149 pitches
70.0 IP1.67 ERA1.17 FIP 40° arm38 SV
Arsenal & Pitch Lab
Movement normalized to arm side · Keystone Stuff by pitch
| Pitch | Use | Velo | IVB | HB | Stuff | Loc | Whiff | xRV/100 |
|---|---|---|---|---|---|---|---|---|
| Slider50% use | 50% | 88.0 | −4.1 | −10.0 | 131 | 99 | 56% | +3.38 |
| Four-seam48% use | 48% | 101.4 | 16.4 | +6.0 | 114 | 94 | 36% | +1.23 |
No mix change or new pitch clears its bar. The arsenal is efficient for its shapes.
Most similar pitchers
Pitches like Miller: same hand, shape, slot and mix
| Similarity | Player | Stuff | ’26 WAR | ’27 proj | 2027 |
|---|---|---|---|---|---|
| 43 | Andrés Muñoz SEA · ’99 | 122 | 0.8 | 1.0 | Club option $8.0M |
| 20 | Edgardo Henriquez LAD · ’02 | 121 | 1.5 | 1.1 | Pre-arb |
| 17 | Louis Varland TOR · ’97 | 120 | 3.1 | 1.5 | Arb |
| 17 | Ryan Zeferjahn CHC · ’98 | 118 | 0.5 | 0.2 | Pre-arb |
| 11 | Trevor Megill MIL · ’93 | 121 | 2.5 | 1.5 | Arb |
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
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 2.4 WAR Arbitration $7.9M*
2028 2.4 WAR Arbitration $12.2M*
2029 2.3 WAR Arbitration $13.9M*
2030 2.2 WAR Free agent
* projected arbitration or minimum salary. Contract Studio →