Head to head · 2026 pitching

Aaron Bummer vs Kyle Leahy

So far in 2026 Kyle Leahy has been worth 3.2 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.

Aaron Bummer ATL

Kyle Leahy STL

2026 pitching, season in progress. The stronger figure in each row is highlighted — for ERA, FIP, WHIP and walks that is the lower one.
Statistic	Aaron Bummer	Kyle Leahy
G	21	29
GS	0	29
IP	16.2	138.0
W	1	10
SO	13	129
ERA	10.26	3.65
FIP	9.16	3.64
WHIP	2.10	1.34
K/9	7.0	8.4
BB/9	5.9	2.7
FIP−	219	87
WAR	-0.8	2.4

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	Aaron Bummer	Kyle Leahy
G	408	127
GS	2	30
IP	398.1	276.1
W	22	15
L	22	9
SV	5	2
SO	442	244
BB	175	84
ERA	4.07	3.65
WHIP	1.35	1.27
K/9	10.0	7.9
BB/9	4.0	2.7
HR/9	0.7	0.8
WAR	5.9	4.3

Aaron Bummer’s full profile →Kyle Leahy’s full profile →

More head to heads

The same seasons, measured against somebody else.

Aaron Bummer vs

Kyle Leahy 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.