MLB Daily DeltaWeek 19 · August 2, 2026
Portrait of Kumar Rocker
Kumar Rocker
TEX · P
Change to
Portrait of Luis Castillo
Luis Castillo
CWS · P
Change to
Who's more valuable, rest of season

Kumar Rocker.

He projects to help you in more roto categories the rest of the way — ERA and wins.

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

Kumar Rocker wins 2 categories (ERA, W); Luis Castillo wins 1 (K); 1 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Kumar Rocker
94.4
Luis Castillo
95.3
Swinging-Strike %lg 11.0% · higher = better
Kumar Rocker
12.4%
Luis Castillo
12.4%
Strikeout %lg 22.0% · higher = better
Kumar Rocker
21.3%
Luis Castillo
19.4%
Chase %lg 28.5% · higher = better
Kumar Rocker
31.7%
Luis Castillo
32.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Kumar Rocker
42.1%
Luis Castillo
41.7%
Barrel % Allowedlg 8.0% · lower = better
Kumar Rocker
7.3%
Luis Castillo
9.7%
xwOBA Allowedlg .315 · lower = better
Kumar Rocker
.329
Luis Castillo
.337
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
2.746.33
lg xERA 4.10
now 3.54
4.41
Luis Castillo
2.746.33
lg xERA 4.10
now 5.53
4.57
WHIPlower is better
Kumar Rocker
1.251.52
now 1.32
1.34
Luis Castillo
1.251.52
now 1.45
1.34

Volume · rest of season
Strikeoutshigher is better
Kumar Rocker
4065.60
now 44
32
Luis Castillo
4065.60
now 56
46
Winshigher is better
Kumar Rocker
.5202.48
now 2
12
Luis Castillo
.5202.48
now 2
12

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

If you already own them — trade angle
SellKumar Rocker — sell.conf 0.69
SellLuis Castillo — sell.conf 0.77
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