MLB Daily DeltaWeek 15 · July 8, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Portrait of Jacob Lopez
Jacob Lopez
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, WHIP); Jacob Lopez wins 2 (ERA, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
David Peterson
92.2
Jacob Lopez
90.6
Swinging-Strike %lg 11.0% · higher = better
David Peterson
10.0%
Jacob Lopez
8.5%
Strikeout %lg 22.0% · higher = better
David Peterson
18.8%
Jacob Lopez
15.6%
Chase %lg 28.5% · higher = better
David Peterson
30.3%
Jacob Lopez
24.5%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
42.2%
Jacob Lopez
31.4%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.6%
Jacob Lopez
4.7%
xwOBA Allowedlg .315 · lower = better
David Peterson
.347
Jacob Lopez
.311
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
2.937.84
lg xERA 4.10
now 5.18
4.78
Jacob Lopez
2.937.84
lg xERA 4.10
now 6.75
4.02
WHIPlower is better
David Peterson
1.292
now 1.59
1.45
Jacob Lopez
1.292
now 1.84
1.59

Volume · rest of season
Strikeoutshigher is better
David Peterson
4078.60
now 56
67
Jacob Lopez
4078.60
now 38
55
Winshigher is better
David Peterson
.0009
now 3
25
Jacob Lopez
.0009
now 4
37

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

If you already own them — trade angle
SellDavid Peterson — sell.conf 0.86
Hold · steadyJacob Lopez — hold.conf 0.60
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