Players · W · Pitcher · 2026
Greg Weissert
- Age
- 31
- B/T
- R/R
- Height
- 6' 2"
- Weight
- 235 lb
- Number
- #57
- Born
- February 4, 1995 in Bay Shore, NY, United States
- MLB debut
- August 25, 2022
- Drafted
- 2016, round 18
- College
- Fordham
- High school
- Bay Shore
- dbWAR
- 2.1 5 season(s)
- IP
- 60.2
- ERA
- 3.26
- FIP
- 3.98
- K/9
- 8.9
- FIP−
- 95 100 = avg
Greg Weissert is a relief pitcher for the Boston Red Sox. In 2026 he struck out 60 batters over 60.2 innings across 63 appearances, going 4-2. His ERA of 3.26 is 21.9% lower than the league average of 4.18 — 10th of 19 on his team, and 125th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 3.98 FIP suggests that his ERA had some help behind him. He missed bats on 23.7% of swings (11.7% of every pitch he threw), walked 7.8% of the batters he faced and struck out 23.5%. His 0.5 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.
WAR by season
Pitching
Standard and advanced, by season.
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 | 93 | 80 | 24 | 3 | 12 | 17 | .300 | .387 | .463 | .369 | 18.3% |
| vs RHB | 162 | 149 | 31 | 5 | 8 | 43 | .208 | .261 | .349 | .271 | 26.5% |
Pitch sequencing
What Greg Weissert throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Greg Weissert throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Sinker | 342 | 94.0 | 2,130 | 50.3% | 11.9% | 92 | .239 | .716 | |
| Four-Seam Fastball | 292 | 94.1 | 2,283 | 51.7% | 24.0% | 74 | .203 | .614 | |
| Changeup | 130 | 85.2 | 1,623 | 47.7% | 45.3% | 30 | .267 | .700 | |
| Sweeper | 124 | 82.0 | 2,883 | 43.5% | 37.3% | 19 | .263 | .536 | |
| Slider | 83 | 85.4 | 2,552 | 48.2% | 10.0% | 12 | — | — | |
| Curveball | 20 | 81.5 | 2,629 | 10.0% | 0.0% | 3 | — | — |
Head to head
Put Greg Weissert beside up to three others.
Or read one already written — Greg Weissert against:
Similar players
Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.
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.