MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Devin Williams
Devin Williams
NYM · P
Change to
Portrait of Kirby Yates
Kirby Yates
PIT · 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

Devin Williams wins 0 (none); Kirby Yates 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
Devin Williams
93.9
Kirby Yates
90.8
Swinging-Strike %lg 11.0% · higher = better
Devin Williams
17.8%
Kirby Yates
14.9%
Strikeout %lg 22.0% · higher = better
Devin Williams
28.7%
Kirby Yates
27.9%
Chase %lg 28.5% · higher = better
Devin Williams
39.0%
Kirby Yates
35.2%
Hard-Hit % Allowedlg 40.0% · lower = better
Devin Williams
29.6%
Kirby Yates
46.6%
Barrel % Allowedlg 8.0% · lower = better
Devin Williams
4.6%
Kirby Yates
5.8%
xwOBA Allowedlg .315 · lower = better
Devin Williams
.282
Kirby Yates
.286
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
Devin Williams
3.026.08
lg xERA 4.10
now 5.40
3.70
Kirby Yates
3.026.08
lg xERA 4.10
now 4.32
3.70
WHIPlower is better
Devin Williams
1.061.69
now 1.55
1.24
Kirby Yates
1.061.69
now 1.20
1.24

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

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

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