MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Devin Williams
Devin Williams
NYM · P
Change to
Portrait of Shawn Armstrong
Shawn Armstrong
CLE · 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); Shawn Armstrong 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
Shawn Armstrong
93.5
Swinging-Strike %lg 11.0% · higher = better
Devin Williams
17.8%
Shawn Armstrong
11.5%
Strikeout %lg 22.0% · higher = better
Devin Williams
28.7%
Shawn Armstrong
21.9%
Chase %lg 28.5% · higher = better
Devin Williams
39.0%
Shawn Armstrong
24.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Devin Williams
29.6%
Shawn Armstrong
34.0%
Barrel % Allowedlg 8.0% · lower = better
Devin Williams
4.6%
Shawn Armstrong
6.2%
xwOBA Allowedlg .315 · lower = better
Devin Williams
.282
Shawn Armstrong
.306
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
2.886.12
lg xERA 4.10
now 5.40
3.70
Shawn Armstrong
2.886.12
lg xERA 4.10
now 3.60
3.70
WHIPlower is better
Devin Williams
1.121.67
now 1.55
1.24
Shawn Armstrong
1.121.67
now 1.33
1.24

Volume · rest of season
Strikeoutshigher is better
Devin Williams
4043.40
now 31
0
Shawn Armstrong
4043.40
now 19
0
Winshigher is better
Devin Williams
.0004.20
now 3
0–0
Shawn Armstrong
.0004.20
now 1
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 & seeShawn Armstrong — hold.conf 0.50
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