Players · S · Pitcher · 2026
Jack Sinclair
- Age
- 27
- B/T
- R/R
- Height
- 6' 4"
- Weight
- 170 lb
- Number
- #49
- Born
- May 3, 1999 in Coral Springs, FL, United States
- MLB debut
- September 4, 2026
- Drafted
- 2021, round 16
- College
- Central Florida
- dbWAR
- .1 1 season(s)
- IP
- 7.2
- ERA
- 2.35
- FIP
- 4.14
- K/9
- 5.9
- FIP−
- 99 100 = avg
Jack Sinclair is a relief pitcher for the Washington Nationals. In 2026 he struck out 5 batters over 7.2 innings across 7 appearances, going 1-0. His ERA of 2.35 is 43.9% lower than the league average of 4.19. Stripping out defence, his 4.14 FIP suggests that his ERA had some help behind him. He missed bats on 14.3% of swings (7.0% of every pitch he threw), walked 12.5% of the batters he faced and struck out 15.6%. His 0.1 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.
League context
Percentile among qualified pitchers, 2026.
Pitching
Standard and advanced, by season.
| Trend | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | WSH | 7 | 0 | 7.2 | 1 | 0 | 1 | 4 | 2 | 5 | 4 | 2.35 | 4.14 | 1.04 | 5.9 | 4.7 | 56 | 99 | 0.1 | — |
Platoon splits
How left- and right-handed hitters fare against him.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHB | 13 | 11 | 3 | 0 | 2 | 1 | .273 | .385 | .545 | .401 | 7.7% |
| vs RHB | 19 | 15 | 1 | 0 | 2 | 4 | .067 | .263 | .067 | .202 | 21.1% |
Pitch sequencing
What Jack Sinclair throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Jack Sinclair throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Sweeper | 52 | 83.7 | 2,549 | 48.1% | 29.2% | 10 | — | — | |
| Four-Seam Fastball | 40 | 97.1 | 2,126 | 37.5% | 5.6% | 11 | — | — | |
| Sinker | 12 | 95.9 | 2,054 | 41.7% | 0.0% | 2 | — | — |
Head to head
Put Jack Sinclair beside up to three others.
wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.