Head to head · 2026 pitching

José Alvarado vs Isaac Mattson

In 2026 José Alvarado 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.

José Alvarado PHI

Isaac Mattson PIT

2026 pitching. The stronger figure in each row is highlighted — for ERA, FIP, WHIP and walks that is the lower one.
Statistic	José Alvarado	Isaac Mattson
G	68	38
GS	0	0
IP	58.1	38.2
W	5	0
SO	70	36
ERA	5.86	5.35
FIP	3.82	3.72
WHIP	1.65	1.60
K/9	10.8	8.4
BB/9	4.8	4.2
FIP−	91	89
WAR	0.7	0.5

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	José Alvarado	Isaac Mattson
G	476	89
GS	1	0
IP	426.2	96.0
W	24	3
L	31	3
SV	53	0
SO	539	90
BB	226	47
ERA	3.80	3.94
WHIP	1.36	1.38
K/9	11.4	8.4
BB/9	4.8	4.4
HR/9	0.7	0.7
WAR	7.0	1.1

José Alvarado’s full profile →Isaac Mattson’s full profile →

More head to heads

The same seasons, measured against somebody else.

José Alvarado vs

Isaac Mattson 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.