MLB Daily DeltaWeek 27 · September 30, 2026
Portrait of Blas Castaño
Blas Castaño
COL · P
Change to
Portrait of Devin Williams
Devin Williams
NYM · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 0–0, 4 even. Take whoever fills a bigger need.

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

Blas Castaño wins 0 (none); Devin Williams wins 0 (none); 4 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Blas Castaño
94.5
Devin Williams
93.9
Swinging-Strike %lg 11.0% · higher = better
Blas Castaño
8.7%
Devin Williams
17.5%
Strikeout %lg 22.0% · higher = better
Blas Castaño
18.9%
Devin Williams
28.3%
Chase %lg 28.5% · higher = better
Blas Castaño
28.7%
Devin Williams
38.6%
Hard-Hit % Allowedlg 40.0% · lower = better
Blas Castaño
48.1%
Devin Williams
29.7%
Barrel % Allowedlg 8.0% · lower = better
Blas Castaño
8.9%
Devin Williams
4.5%
xwOBA Allowedlg .315 · lower = better
Blas Castaño
.367
Devin Williams
.278
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
Blas Castaño
3.026.08
lg xERA 4.10
now 4.91
3.70
Devin Williams
3.026.08
lg xERA 4.10
now 5.40
3.70
WHIPlower is better
Blas Castaño
1.121.67
now 1.45
1.24
Devin Williams
1.121.67
now 1.55
1.24

Volume · rest of season
Strikeoutshigher is better
Blas Castaño
4043.40
now 10
0
Devin Williams
4043.40
now 31
0
Winshigher is better
Blas Castaño
.0004.20
now 0
0–0
Devin Williams
.0004.20
now 3
0–0

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

If you already own them — trade angle
Hold · wait & seeBlas Castaño — hold.conf 0.50
Buy LowDevin Williams — buy low. The dip is a window to acquire.conf 0.90
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