Head to head · 2026 pitching

Aroldis Chapman vs Brent Headrick

In 2026 Brent Headrick has been worth 0.8 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.

Aroldis Chapman BOS

Brent Headrick NYY

2026 pitching. The stronger figure in each row is highlighted — for ERA, FIP, WHIP and walks that is the lower one.
Statistic	Aroldis Chapman	Brent Headrick
G	53	81
GS	0	0
IP	51.2	78.1
W	3	7
SO	71	98
ERA	1.92	2.18
FIP	2.50	2.46
WHIP	1.12	1.21
K/9	12.4	11.3
BB/9	4.0	3.1
FIP−	60	59
WAR	1.3	2.1

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	Aroldis Chapman	Brent Headrick
G	657	113
GS	0	0
IP	620.1	130.0
W	48	10
L	36	4
SV	289	1
SO	972	163
BB	309	46
ERA	2.55	3.18
WHIP	1.12	1.23
K/9	14.1	11.3
BB/9	4.5	3.2
HR/9	0.6	1.2
WAR	15.8	1.9

Aroldis Chapman’s full profile →Brent Headrick’s full profile →

More head to heads

The same seasons, measured against somebody else.

Aroldis Chapman vs

Brent Headrick 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.