MLB Daily DeltaWeek 19 · July 30, 2026
Portrait of Luis Castillo
Luis Castillo
SEA · P
Change to
Portrait of Mitch Keller
Mitch Keller
PIT · P
Change to
Who's more valuable, rest of season

Luis Castillo.

He projects to help you in more roto categories the rest of the way — strikeouts, ERA, and WHIP. Mitch Keller’s box score looks better right now, but the luck-stripped projection flips it.

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

Luis Castillo wins 3 categories (K, ERA, WHIP); Mitch Keller wins 1 (W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Luis Castillo
95.3
Mitch Keller
93.4
Swinging-Strike %lg 11.0% · higher = better
Luis Castillo
12.4%
Mitch Keller
9.8%
Strikeout %lg 22.0% · higher = better
Luis Castillo
19.4%
Mitch Keller
17.9%
Chase %lg 28.5% · higher = better
Luis Castillo
32.9%
Mitch Keller
30.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Luis Castillo
41.7%
Mitch Keller
42.1%
Barrel % Allowedlg 8.0% · lower = better
Luis Castillo
9.7%
Mitch Keller
6.8%
xwOBA Allowedlg .315 · lower = better
Luis Castillo
.337
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
Luis Castillo
3.886
lg xERA 4.10
now 5.53
4.59
Mitch Keller
3.886
lg xERA 4.10
now 4.35
4.77
WHIPlower is better
Luis Castillo
1.061.56
now 1.45
1.34
Mitch Keller
1.061.56
now 1.17
1.36

Volume · rest of season
Strikeoutshigher is better
Luis Castillo
4063.20
now 56
49
Mitch Keller
4063.20
now 51
38
Winshigher is better
Luis Castillo
.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
SellLuis Castillo — sell.conf 0.78
SellMitch Keller — sell.conf 0.86
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