Players · W · Pitcher · 2026 regular season

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

Compare with…vs Trevor Richards vs Brooks Raley vs Jacob Webb

dbWAR: 2.1
IP: 60.2
ERA: 3.26
FIP: 3.98
K/9: 8.9
FIP−: 95

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 was 21.9% lower than the league average of 4.18 — 10th of 19 on his team, and 130th of 539 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 regular season.

FIP3.98

K/98.9

WHIP1.24

WAR.5

WAR by season

Pitching Regular season

Standard and advanced, by season. Regular-season games only — postseason games are listed separately below.


2026	BOS	63	60.2	4	2	1	55	22	60	20	3.26	3.98	1.24	8.9	3.0	78	95	0.5
2025	BOS	72	67.0	6	6	4	57	21	57	21	2.82	3.67	1.16	7.7	2.8	68	88	0.8
2024	BOS	62	63.1	4	2	1	65	22	58	20	3.13	3.72	1.34	8.2	2.8	77	91	0.7
2023	NYY	17	20.0	0	0	0	21	9	22	8	4.05	4.36	1.45	9.9	3.6	93	101	0.1
2022	NYY	12	11.1	3	0	0	6	7	11	5	5.56	4.17	0.97	8.7	4.0	140	105	0.0

Separate from the regular season

Postseason Postseason

Wild Card through World Series. These games are counted on their own: none of them are in the regular-season tables, career totals, league context, leaderboards or dbWAR on this page.

Postseason pitching

Postseason Greg Weissert's postseason pitching, by October and round. Not part of any regular-season figure on this page.
Season	Team	Round	G	IP
2026 Post	BOS	Wild Card · through Sep 29	1	1.0
2025 Post	BOS	Wild Card	1	1.0
Career		Postseason total · 2 Octobers	2	2.0

Box-score and rate statistics only. wOBA, wRC+, FIP and dbWAR are measured against a full league season, and a postseason is a few teams playing each other for a month, so they are not computed for October.

Platoon splits

How left- and right-handed hitters fare against him.

Season

Opponent batting by the side the hitter bats from, 2026. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
Split	PA	AB	H	HR	BB	SO	AVG	OBP	SLG	wOBA	K%
vs LHB	93	80	24	3	12	17	.300	.387	.463	.368	18.3%
vs RHB	162	149	31	5	8	43	.208	.261	.349	.270	26.5%

Pitch sequencing

What Greg Weissert throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter

SinkerFour-seamChangeupSweeperSliderCurveball

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.

Season


Sinker	34.5%	342	94.0	2,130	50.3%	11.9%	92	.239	.716
Four-Seam Fastball	29.5%	292	94.1	2,283	51.7%	24.0%	74	.203	.614
Changeup	13.1%	130	85.2	1,623	47.7%	45.3%	30	.267	.700
Sweeper	12.5%	124	82.0	2,883	43.5%	37.3%	19	.263	.536
Slider	8.4%	83	85.4	2,552	48.2%	10.0%	12	—	—
Curveball	2.0%	20	81.5	2,629	10.0%	0.0%	3	—	—

Greg Weissert's arsenal by usage. Velocity is average release speed in mph, spin in rpm, and whiff rate is misses per swing — the cleanest single measure of whether a pitch beats hitters. BAA and OPS are what hitters did against each pitch, credited to the one that ended the plate appearance, and are left blank under 15 at-bats.

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Similar players

Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.

JoJo RomeroSTL

ERA: 3.04
FIP: 3.97
SO: 54
WAR: 0.4

Very close

Daniel PalenciaCHC

ERA: 3.64
FIP: 4.05
SO: 30
WAR: 0.2

Very close

Hunter GaddisCLE

ERA: 2.98
FIP: 3.97
SO: 57
WAR: 0.5

Very close

Brooks RaleyNYM

ERA: 3.25
FIP: 3.96
SO: 51
WAR: 0.4

Very close

How these are computed

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.