MLB Daily DeltaWeek 19 · August 1, 2026
Portrait of Dustin May
Dustin May
STL · P
Change to
Portrait of Martín Pérez
Martín Pérez
ATL · P
Change to
Who's more valuable, rest of season

Dustin May.

He projects to help you in more roto categories the rest of the way — strikeouts, ERA, and WHIP. Martín Pérez’s box score looks better right now, but it’s built on luck that won’t hold.

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

Dustin May wins 3 categories (K, ERA, WHIP); Martín Pérez wins 0 (none); 1 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Dustin May
96.9
Martín Pérez
89.9
Swinging-Strike %lg 11.0% · higher = better
Dustin May
10.5%
Martín Pérez
9.1%
Strikeout %lg 22.0% · higher = better
Dustin May
23.1%
Martín Pérez
18.5%
Chase %lg 28.5% · higher = better
Dustin May
29.8%
Martín Pérez
25.6%
Hard-Hit % Allowedlg 40.0% · lower = better
Dustin May
46.1%
Martín Pérez
38.1%
Barrel % Allowedlg 8.0% · lower = better
Dustin May
6.5%
Martín Pérez
6.4%
xwOBA Allowedlg .315 · lower = better
Dustin May
.306
Martín Pérez
.332
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
2.085.28
lg xERA 4.10
now 4.57
3.91
Martín Pérez
2.085.28
lg xERA 4.10
now 2.79
4.48
WHIPlower is better
Dustin May
.9301.51
now 1.30
1.33
Martín Pérez
.9301.51
now 1.06
1.38

Volume · rest of season
Strikeoutshigher is better
Dustin May
4058.60
now 51
37
Martín Pérez
4058.60
now 42
32
Winshigher is better
Dustin May
.2003.80
now 3
13
Martín Pérez
.2003.80
now 3
23

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 0.74
Sell HighMartín Pérez — sell high. His value is peaking; good time to trade him.conf 0.95
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