MLB Daily DeltaWeek 19 · July 31, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Luis Morales
ATH · 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

David Peterson wins 2 (K, W); Luis Morales wins 2 (ERA, WHIP); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
David Peterson
92.3
Luis Morales
97.0
Swinging-Strike %lg 11.0% · higher = better
David Peterson
9.8%
Luis Morales
8.7%
Strikeout %lg 22.0% · higher = better
David Peterson
18.0%
Luis Morales
15.8%
Chase %lg 28.5% · higher = better
David Peterson
28.9%
Luis Morales
27.0%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
43.5%
Luis Morales
42.0%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.8%
Luis Morales
12.0%
xwOBA Allowedlg .315 · lower = better
David Peterson
.346
Luis Morales
.419
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
David Peterson
28.25
lg xERA 4.10
now 5.18
4.78
Luis Morales
28.25
lg xERA 4.10
now 14.46
4.10
WHIPlower is better
David Peterson
.9002.55
now 1.59
1.44
Luis Morales
.9002.55
now 3.11
1.30

Volume · rest of season
Strikeoutshigher is better
David Peterson
4075.60
now 56
46
Luis Morales
4075.60
now 7
27
Winshigher is better
David Peterson
.0004.20
now 3
13
Luis Morales
.0004.20
now 0
00

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

If you already own them — trade angle
SellDavid Peterson — sell.conf 0.86
Hold · wait & seeLuis Morales — hold.conf 0.55
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