Evan Sisk
- Winter Plan late-inning relief · 50 IP · 0.4 WAR in the role
- Injured list 2026: Left elbow inflammation (Jul 4–Aug 5)
This winter
What the Winter Plan does with Sisk: its decisions feed, the dated moves and the briefs
The plan keeps him: late-inning relief · 50 IP · 0.4 WAR in the role.
Options left: 1 (Keystone’s estimate).
- 2027 starter hook and bullpen rolesdue Spring training · medium confidence
Rotation (Winter Plan): Paul Skenes, Jared Jones, Braxton Ashcraft, Bubba Chandler and Mitch Keller. Two times through for Mitch Keller once his medicals clear. Let Braxton Ashcraft face the order a third time (a toss-up). Let Paul Skenes face it too, pending the review of his velocity drop. Jared Jones: a 22-batter leash (about 81 pitches) after his arm injury, not an open third time; past it, decide by matchup (a toss-up). Give Bubba Chandler development innings on a 22-batter leash (about 82 pitches), once through the top of the order a third time, at about 1.0 ± 1.2 runs against a two-times-through hook (a toss-up); the goal is first two passes at .306 xwOBA or better, not a third-time skill, pending the review of his velocity drop. Ladder: Mason Montgomery and Yohan Ramírez in the late innings (within noise of each other); Evan Sisk and Luke Weaver setting up (within noise of each other). Move Evan Sisk into the leverage ladder. Move Isaac Mattson out of it.
Development · trends & plan
Tracked levels only. Monthly values; gaps mark the offseason. The number beside each line is its last month, with that month’s sample (faded under 50 PA or 150 pitches), not the season.
Plan for 2027
- 1 Command medium ask Command first: start with the sweeper
Location 75 (2nd percentile) in 2026 with a 12.7% walk rate over 197 batters (MLB median 8.6%). His sweeper grades 80 on location and lands in the zone 35% of the time (MLB sweepers: 43%). With no plan, a walk rate like his tends to come back toward the median on its own (about 10.9% next year); the target, 9.4%, is the more ambitious of a realistic one-year step (the median, his own best season on today’s league basis, or a big one-year gain) and what a quarter of similar pitchers beat with no plan.
Walk rate: 12.7% target 9.4% no plan ≈ 10.9% No one-season check: a lean. Telling this target from noise takes about 362 batters faced; he had 194 in 2026. Keystone Location - 2 Health note low ask Medical note: check in before the winter program
Left elbow inflammation (15-day IL, Jul 4–Aug 5, 2026). He came back and played 18 games after it, so it doesn’t hold up the rest of the plan.
Health & Workload - ✓ Keep Keep the gain: sinker velocity (primary fastball) up
2025 → 2026 at MLB.
Sinker velocity (primary fastball): 90.0 mph→ 91.1 mph
Each goal is checked when his sample can tell the target from noise: the 2027 All-Star break if it can by then, else season’s end or the sample it needs; if no single season can, it’s a lean. Coach card
Trends · MLB
Clear changes
- ▲ sinker velocity (primary fastball) 90.0 mph → 91.1 mph +1.2 mph 2025 → 2026 · MLB
Pitching · 2026 percentiles
vs. MLB pitchers with 500+ pitches · 833 pitches
Arsenal & Pitch Lab
Movement normalized to arm side · Keystone Stuff by pitch
| Pitch | Use | Velo | IVB | HB | Stuff | Loc | Whiff | xRV/100 |
|---|---|---|---|---|---|---|---|---|
| Sinker31% use | 31% | 91.1 | 5.9 | +15.6 | 102 | 85 | 16% | −0.44 |
| Curveball27% use | 27% | 77.6 | −6.2 | −11.3 | 121 | 90 | 31% | +1.69 |
| Four-seam17% use | 17% | 91.5 | 13.0 | +7.2 | 96 | 85 | 32% | +1.28 |
| Sweeper17% use | 17% | 80.3 | 5.5 | −11.2 | 118 | 80 | 35% | +0.55 |
| Changeup9% use | 9% | 83.6 | 3.2 | +16.6 | 101 | 69 | 29% | −0.46 |
No mix change or new pitch clears its bar. The arsenal is efficient for its shapes.
Most similar pitchers
Pitches like Sisk: same hand, shape, slot and mix
| Similarity | Player | Stuff | ’26 WAR | ’27 proj | 2027 |
|---|---|---|---|---|---|
| 42 | Bryan Hudson CWS · ’97 | 117 | 1.3 | 0.7 | Pre-arb |
| 38 | DL Hall MIL · ’98 | 111 | 0.3 | 0.4 | Arb |
| 37 | Tim Herrin CLE · ’96 | 95 | 0.2 | 0.1 | Arb |
| 36 | Justin Bruihl STL · ’97 | 106 | 0.3 | 0.2 | — |
| 34 | Jacob Lopez ATH · ’98 | 109 | 0.8 | 1.1 | Pre-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
* Estimated: RosterResource has no contract row for him, so control through 2030 estimated from his MLB debut (2025-04-15): six years of service at the earliest; he isn’t in the contract data, and time in the minors would add seasons; pre-arbitration years at the minimum, arbitration years from Keystone’s arbitration model. Contract Studio →
Minor leagues
MLB Stats API · public box-score data
| SeasonLevel | Level | Team | Age | G | PA / IP | PA / IP ·Line |
|---|---|---|---|---|---|---|
| 2026AAA | AAA | Indianapolis Indians | 29 | 18 | 22 IP | 22 IP · 2.45 ERA · 31.2% K · 10.8% BB |
| 2025AAA | AAA | Indianapolis Indians | 28 | 38 | 37 IP | 37 IP · 4.38 ERA · 24.4% K · 8.7% BB |