MLB Daily DeltaWeek 20 · August 9, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Matt Waldron
TOR · 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); Matt Waldron 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
Matt Waldron
92.0
Swinging-Strike %lg 11.0% · higher = better
David Peterson
9.7%
Matt Waldron
8.5%
Strikeout %lg 22.0% · higher = better
David Peterson
18.5%
Matt Waldron
19.3%
Chase %lg 28.5% · higher = better
David Peterson
28.8%
Matt Waldron
30.0%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
41.5%
Matt Waldron
39.6%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.7%
Matt Waldron
6.3%
xwOBA Allowedlg .315 · lower = better
David Peterson
.341
Matt Waldron
.302
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
2.338.25
lg xERA 4.10
now 5.18
4.66
Matt Waldron
2.338.25
lg xERA 4.10
now 8.49
4.09
WHIPlower is better
David Peterson
1.141.87
now 1.59
1.43
Matt Waldron
1.141.87
now 1.71
1.30

Volume · rest of season
Strikeoutshigher is better
David Peterson
4069.60
now 56
37
Matt Waldron
4069.60
now 22
29
Winshigher is better
David Peterson
.2003.80
now 3
13
Matt Waldron
.2003.80
now 1
12

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

If you already own them — trade angle
SellDavid Peterson — sell.conf 0.81
Buy LowMatt Waldron — buy low. The dip is a window to acquire.conf 0.90
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