MLB Daily DeltaWeek 19 · July 31, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Robert Gasser
MIL · 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); Robert Gasser 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
Robert Gasser
92.5
Swinging-Strike %lg 11.0% · higher = better
David Peterson
9.8%
Robert Gasser
11.7%
Strikeout %lg 22.0% · higher = better
David Peterson
18.0%
Robert Gasser
21.5%
Chase %lg 28.5% · higher = better
David Peterson
28.9%
Robert Gasser
29.5%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
43.5%
Robert Gasser
30.4%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.8%
Robert Gasser
6.4%
xwOBA Allowedlg .315 · lower = better
David Peterson
.346
Robert Gasser
.300
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
3.185.75
lg xERA 4.10
now 5.18
4.78
Robert Gasser
3.185.75
lg xERA 4.10
now 4.73
3.75
WHIPlower is better
David Peterson
1.091.73
now 1.59
1.44
Robert Gasser
1.091.73
now 1.43
1.23

Volume · rest of season
Strikeoutshigher is better
David Peterson
4073.60
now 56
46
Robert Gasser
4073.60
now 12
28
Winshigher is better
David Peterson
.0004.20
now 3
13
Robert Gasser
.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
BuyRobert Gasser — buy.conf 0.70
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