DataBaseball
2026

Head to head · 2025 pitching

Caleb Boushley vs Mark Leiter Jr.

In 2025 Mark Leiter Jr. has been worth 0.2 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.

2025 pitching. The stronger figure in each row is highlighted — for ERA, FIP, WHIP and walks that is the lower one.
StatisticCaleb BoushleyMark Leiter Jr.
G2559
GS10
IP43.148.1
W06
SO4154
ERA6.024.84
FIP3.853.55
WHIP1.571.53
K/98.510.1
BB/92.93.2
FIP−9385
WAR0.40.6

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.
StatisticCaleb BoushleyMark Leiter Jr.
G28306
GS115
IP49.2386.0
W116
L030
SV113
SO47434
BB18142
ERA5.804.57
WHIP1.591.33
K/98.510.1
BB/93.33.3
HR/91.11.3
WAR0.32.5

More head to heads

The same seasons, measured against somebody else.

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.