MLB Daily DeltaWeek 18 · July 29, 2026
Portrait of George Kirby
George Kirby
SEA · P
Change to
Portrait of Nick Martinez
Nick Martinez
TB · 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

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

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
George Kirby
96.6
Nick Martinez
92.8
Swinging-Strike %lg 11.0% · higher = better
George Kirby
11.7%
Nick Martinez
8.9%
Strikeout %lg 22.0% · higher = better
George Kirby
21.5%
Nick Martinez
14.2%
Chase %lg 28.5% · higher = better
George Kirby
34.0%
Nick Martinez
32.0%
Hard-Hit % Allowedlg 40.0% · lower = better
George Kirby
42.0%
Nick Martinez
31.9%
Barrel % Allowedlg 8.0% · lower = better
George Kirby
7.5%
Nick Martinez
6.8%
xwOBA Allowedlg .315 · lower = better
George Kirby
.306
Nick Martinez
.321
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
George Kirby
25.33
lg xERA 4.10
now 3.77
3.93
Nick Martinez
25.33
lg xERA 4.10
now 1.62
4.27
WHIPlower is better
George Kirby
1.031.38
now 1.22
1.30
Nick Martinez
1.031.38
now 1.11
1.25

Volume · rest of season
Strikeoutshigher is better
George Kirby
4069.80
now 59
42
Nick Martinez
4069.80
now 41
32
Winshigher is better
George Kirby
.8006.20
now 5
25
Nick Martinez
.8006.20
now 5
25

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

If you already own them — trade angle
Hold · leans buyGeorge Kirby — hold.conf 0.60
Sell HighNick Martinez — sell high. His value is peaking; good time to trade him.conf 0.95
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