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Aaron Bummer

Pitcher · Kansas City Royals. 2025 season stats with ranks among qualified players.

Pitching, 2025

Aaron Bummer posted a 3.81 ERA and a 3.58 FIP with a 21.5% strikeout rate over 54.3 innings in 2025.

Stat	2025	Percentile
Innings pitched	54.3	–
Starts	2	–
ERA	3.81	41st percentile
FIP	3.58	59th percentile
xFIP	3.69	67th percentile
Strikeout %	21.5%	36th percentile
Walk %	7.6%	57th percentile
K-BB%	13.9%	41st percentile
Home runs per 9	0.50	89th percentile
Whiff %	21.5%	28th percentile
Fastball velocity	91.0	–

Percentile compares each number with the 198 qualified pitchers in 2025 (100th = best, including for stats where lower is better).

Recent seasons

Season	IP	ERA	FIP	K%	BB%
2026	16.7	10.26	9.16	14.8%	12.5%
2025	54.3	3.81	3.58	21.5%	7.6%
2024	55.3	3.58	2.23	28.1%	7.3%

Kansas City Royals teammates

About these numbers

Season totals and rates from every regular-season game. wRC+ is runs created adjusted for park and league (100 is average); FIP and xFIP estimate a pitcher's run prevention from strikeouts, walks and home runs; K-BB% is strikeout rate minus walk rate.

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