MLB Daily DeltaWeek 15 · July 8, 2026
Portrait of Eury Pérez
Eury Pérez
MIA · P
Change to
Portrait of George Kirby
George Kirby
SEA · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 22. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV n/a

Eury Pérez wins 2 (K, WHIP); George Kirby wins 2 (ERA, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Eury Pérez
98.2
George Kirby
96.7
Swinging-Strike %lg 11.0% · higher = better
Eury Pérez
14.6%
George Kirby
11.2%
Strikeout %lg 22.0% · higher = better
Eury Pérez
27.6%
George Kirby
21.1%
Chase %lg 28.5% · higher = better
Eury Pérez
30.7%
George Kirby
34.8%
Hard-Hit % Allowedlg 40.0% · lower = better
Eury Pérez
39.3%
George Kirby
41.6%
Barrel % Allowedlg 8.0% · lower = better
Eury Pérez
13.8%
George Kirby
6.7%
xwOBA Allowedlg .315 · lower = better
Eury Pérez
.316
George Kirby
.300
stabilized — trust it · small sample yet · dashed = league avg · right = better
05

The tape

Rest-of-season projection · bold = leads
rest-of-season projection current season projection range
Rate · earned-run quality
ERAlower is better
Eury Pérez
3.374.95
lg xERA 4.10
now 4.60
4.14
George Kirby
3.374.95
lg xERA 4.10
now 3.77
3.72
WHIPlower is better
Eury Pérez
1.151.39
now 1.26
1.27
George Kirby
1.151.39
now 1.22
1.32

Volume · rest of season
Strikeoutshigher is better
Eury Pérez
51.8084.20
now 72
77
George Kirby
51.8084.20
now 59
59
Winshigher is better
Eury Pérez
.0009
now 3
24
George Kirby
.0009
now 5
37

SV — not applicable. Both pitch out of the rotation.

If you already own them — trade angle
Hold · steadyEury Pérez — hold.conf 0.60
BuyGeorge Kirby — buy.conf 0.71
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