MLB Daily DeltaWeek 19 · July 31, 2026
Portrait of Kumar Rocker
Kumar Rocker
TEX · P
Change to
Portrait of Mitch Keller
Mitch Keller
PIT · 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

Kumar Rocker wins 2 (ERA, WHIP); Mitch Keller wins 2 (K, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Kumar Rocker
94.4
Mitch Keller
93.4
Swinging-Strike %lg 11.0% · higher = better
Kumar Rocker
12.4%
Mitch Keller
9.8%
Strikeout %lg 22.0% · higher = better
Kumar Rocker
21.3%
Mitch Keller
17.9%
Chase %lg 28.5% · higher = better
Kumar Rocker
31.7%
Mitch Keller
30.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Kumar Rocker
42.1%
Mitch Keller
42.1%
Barrel % Allowedlg 8.0% · lower = better
Kumar Rocker
7.3%
Mitch Keller
6.8%
xwOBA Allowedlg .315 · lower = better
Kumar Rocker
.329
Mitch Keller
.345
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
Kumar Rocker
3.055.25
lg xERA 4.10
now 3.54
4.42
Mitch Keller
3.055.25
lg xERA 4.10
now 4.35
4.76
WHIPlower is better
Kumar Rocker
1.091.44
now 1.32
1.34
Mitch Keller
1.091.44
now 1.17
1.36

Volume · rest of season
Strikeoutshigher is better
Kumar Rocker
4057.80
now 44
34
Mitch Keller
4057.80
now 51
38
Winshigher is better
Kumar Rocker
.0006.60
now 2
12
Mitch Keller
.0006.60
now 5
25

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

If you already own them — trade angle
SellKumar Rocker — sell.conf 0.70
SellMitch Keller — sell.conf 0.85
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