Head to head · 2026 pitching

Mitch Keller vs Matthew Liberatore

In 2026 the two have been worth the same 1.0 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.

Their 2025 seasons were among each other's nearest on rate statistics.

Mitch Keller PIT

Matthew Liberatore STL

2026 season

2026 pitching. The stronger figure in each row is highlighted — for ERA, FIP, WHIP and walks that is the lower one.
Statistic	Mitch Keller	Matthew Liberatore
G	22	31
GS	22	31
IP	115.2	155.0
W	6	6
SO	89	154
ERA	5.29	5.23
FIP	4.55	4.63
WHIP	1.37	1.46
K/9	6.9	8.9
BB/9	3.3	3.2
FIP−	109	111
WAR	1.0	1.0

Career

Totalled over the seasons published here, which is not the same as a whole career: a player who debuted before 2005 begins at 2005, 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 season table.
Statistic	Mitch Keller	Matthew Liberatore
G	187	151
GS	185	84
IP	993.2	489.0
W	48	22
L	73	38
SV	0	0
SO	926	426
BB	341	166
ERA	4.60	4.82
WHIP	1.38	1.40
K/9	8.4	7.8
BB/9	3.1	3.1
HR/9	1.1	1.3
WAR	13.6	4.0

Mitch Keller’s full profile →Matthew Liberatore’s full profile →

More head to heads

The same seasons, measured against somebody else.

Mitch Keller vs

Matthew Liberatore 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.