Head to head · 2025 pitching

George Kirby vs Spencer Schwellenbach

In 2025 the two have been worth the same 2.5 wins. Both lines are computed from play-by-play on the same constants, so they are measured the same way rather than quoted from two sources.

George Kirby SEA

Spencer Schwellenbach ATL

2025 pitching. The stronger figure in each row is highlighted — for ERA, FIP, WHIP and walks that is the lower one.
Statistic	George Kirby	Spencer Schwellenbach
G	23	17
GS	23	17
IP	126.0	110.2
W	10	7
SO	137	108
ERA	4.21	3.09
FIP	3.37	3.25
WHIP	1.19	0.97
K/9	9.8	8.8
BB/9	2.1	1.5
FIP−	81	78
WAR	2.5	2.5

Career

Totalled over the seasons published here, which is not the same as a whole career: a player who debuted before 2015 begins at 2015, not at his real first game.

Career pitching totals. ERA, WHIP and the per-nine rates are recomputed from the components rather than averaged; FIP needs each season’s own constant and is left to the table above.
Statistic	George Kirby	Spencer Schwellenbach
G	141	38
GS	141	38
IP	807.1	234.1
W	54	15
L	45	11
SV	0	0
SO	764	235
BB	137	41
ERA	3.72	3.23
WHIP	1.17	1.01
K/9	8.5	9.0
BB/9	1.5	1.6
HR/9	1.0	1.0
WAR	16.3	5.1

George Kirby’s full profile →Spencer Schwellenbach’s full profile →

More head to heads

The same seasons, measured against somebody else.

George Kirby vs

Spencer Schwellenbach vs

How these are computed

FIP uses the constant solved from this season’s own runs, and FIP− is park-adjusted against the same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page. To put these two beside a third, the comparison page takes up to four.