Head to head · 2026 pitching

Jake Irvin vs Jack Leiter

In 2026 Jack Leiter has been worth 0.1 more 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.

Jake Irvin WSH

Jack Leiter TEX

2026 pitching. The stronger figure in each row is highlighted — for ERA, FIP, WHIP and walks that is the lower one.
Statistic	Jake Irvin	Jack Leiter
G	22	15
GS	20	15
IP	106.2	80.0
W	2	3
SO	110	83
ERA	5.48	5.29
FIP	5.08	4.77
WHIP	1.39	1.44
K/9	9.3	9.3
BB/9	4.0	3.9
FIP−	122	114
WAR	0.3	0.4

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	Jake Irvin	Jack Leiter
G	112	53
GS	110	50
IP	595.1	267.1
W	24	13
L	44	20
SV	0	0
SO	489	262
BB	216	119
ERA	5.03	4.95
WHIP	1.35	1.38
K/9	7.4	8.8
BB/9	3.3	4.0
HR/9	1.6	1.3
WAR	1.1	1.7

Jake Irvin’s full profile →Jack Leiter’s full profile →

More head to heads

The same seasons, measured against somebody else.

Jake Irvin vs

Jack Leiter 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.