MLB Daily DeltaWeek 18 · July 24, 2026
Portrait of Dustin May
Dustin May
STL · P
Change to
Portrait of Spencer Arrighetti
Spencer Arrighetti
HOU · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 22. Take whoever fills a bigger need.

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

Dustin May wins 2 (ERA, WHIP); Spencer Arrighetti wins 2 (K, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Dustin May
96.9
Spencer Arrighetti
92.4
Swinging-Strike %lg 11.0% · higher = better
Dustin May
10.5%
Spencer Arrighetti
10.9%
Strikeout %lg 22.0% · higher = better
Dustin May
22.9%
Spencer Arrighetti
23.1%
Chase %lg 28.5% · higher = better
Dustin May
30.1%
Spencer Arrighetti
26.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Dustin May
45.4%
Spencer Arrighetti
30.9%
Barrel % Allowedlg 8.0% · lower = better
Dustin May
6.1%
Spencer Arrighetti
7.8%
xwOBA Allowedlg .315 · lower = better
Dustin May
.306
Spencer Arrighetti
.344
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
Dustin May
26.09
lg xERA 4.10
now 4.57
3.91
Spencer Arrighetti
26.09
lg xERA 4.10
now 1.34
4.73
WHIPlower is better
Dustin May
1.021.52
now 1.30
1.34
Spencer Arrighetti
1.021.52
now 1.13
1.41

Volume · rest of season
Strikeoutshigher is better
Dustin May
4056.60
now 51
43
Spencer Arrighetti
4056.60
now 43
47
Winshigher is better
Dustin May
.00013.20
now 3
24
Spencer Arrighetti
.00013.20
now 7
510

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

If you already own them — trade angle
Buy LowDustin May — buy low. The dip is a window to acquire.conf 0.86
Sell HighSpencer Arrighetti — sell high. His value is peaking; good time to trade him.conf 0.94
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