MLB Daily DeltaWeek 25 · September 11, 2026
Portrait of Luis Castillo
Luis Castillo
CWS · P
Change to
Sean Sullivan
COL · P
Change to
Who's more valuable, rest of season

Sean Sullivan.

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

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

Sean Sullivan 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
Sean Sullivan
87.6
Swinging-Strike %lg 11.0% · higher = better
Luis Castillo
12.6%
Sean Sullivan
7.7%
Strikeout %lg 22.0% · higher = better
Luis Castillo
19.2%
Sean Sullivan
14.0%
Chase %lg 28.5% · higher = better
Luis Castillo
31.8%
Sean Sullivan
28.1%
Hard-Hit % Allowedlg 40.0% · lower = better
Luis Castillo
42.0%
Sean Sullivan
34.5%
Barrel % Allowedlg 8.0% · lower = better
Luis Castillo
9.5%
Sean Sullivan
9.5%
xwOBA Allowedlg .315 · lower = better
Luis Castillo
.339
Sean Sullivan
.335
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
27.74
lg xERA 4.10
now 5.53
4.64
Sean Sullivan
27.74
lg xERA 4.10
now 0.00
4.10
WHIPlower is better
Luis Castillo
.9001.76
now 1.45
1.36
Sean Sullivan
.9001.76
now 0.67
1.30

Volume · rest of season
Strikeoutshigher is better
Luis Castillo
4077.60
now 56
12
Sean Sullivan
4077.60
now 2
6
Winshigher is better
Luis Castillo
.0002.80
now 2
01
Sean Sullivan
.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 0.80
Hold · wait & seeSean Sullivan — hold.conf 0.55
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