MLB Daily DeltaWeek 25 · September 10, 2026
Portrait of Luis Castillo
Luis Castillo
CWS · P
Change to
Quinn Mathews
STL · P
Change to
Who's more valuable, rest of season

Quinn Mathews.

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

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

Quinn Mathews wins 2 categories (ERA, WHIP); 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
Luis Castillo
95.3
Quinn Mathews
93.6
Swinging-Strike %lg 11.0% · higher = better
Luis Castillo
12.6%
Quinn Mathews
11.7%
Strikeout %lg 22.0% · higher = better
Luis Castillo
19.2%
Quinn Mathews
20.4%
Chase %lg 28.5% · higher = better
Luis Castillo
31.8%
Quinn Mathews
26.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Luis Castillo
42.0%
Quinn Mathews
36.2%
Barrel % Allowedlg 8.0% · lower = better
Luis Castillo
9.5%
Quinn Mathews
2.1%
xwOBA Allowedlg .315 · lower = better
Luis Castillo
.339
Quinn Mathews
.291
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
2.836.30
lg xERA 4.10
now 5.53
4.63
Quinn Mathews
2.836.30
lg xERA 4.10
now 3.60
4.10
WHIPlower is better
Luis Castillo
1.102
now 1.45
1.36
Quinn Mathews
1.102
now 1.80
1.30

Volume · rest of season
Strikeoutshigher is better
Luis Castillo
4077.20
now 56
13
Quinn Mathews
4077.20
now 3
6
Winshigher is better
Luis Castillo
.0002.80
now 2
01
Quinn Mathews
.0002.80
now 0
00

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

If you already own them — trade angle
SellLuis Castillo — sell.conf 0.79
Buy LowQuinn Mathews — buy low. The dip is a window to acquire.conf 0.78
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