MLB Daily DeltaWeek 15 · July 5, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Portrait of Matthew Liberatore
Matthew Liberatore
STL · P
Change to
Who's more valuable, rest of season

David Peterson.

He projects to help you in more roto categories the rest of the way — strikeouts and ERA. Matthew Liberatore’s box score looks better right now, but the luck-stripped projection flips it.

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

David Peterson wins 2 categories (K, ERA); Matthew Liberatore wins 1 (WHIP); 1 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
David Peterson
92.2
Matthew Liberatore
94.5
Swinging-Strike %lg 11.0% · higher = better
David Peterson
10.0%
Matthew Liberatore
10.7%
Strikeout %lg 22.0% · higher = better
David Peterson
18.8%
Matthew Liberatore
21.5%
Chase %lg 28.5% · higher = better
David Peterson
30.3%
Matthew Liberatore
29.4%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
42.2%
Matthew Liberatore
42.9%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.6%
Matthew Liberatore
10.6%
xwOBA Allowedlg .315 · lower = better
David Peterson
.347
Matthew Liberatore
.359
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
4.025.51
lg xERA 4.10
now 5.18
4.76
Matthew Liberatore
4.025.51
lg xERA 4.10
now 4.35
5.04
WHIPlower is better
David Peterson
1.311.67
now 1.59
1.45
Matthew Liberatore
1.311.67
now 1.50
1.39

Volume · rest of season
Strikeoutshigher is better
David Peterson
50.4075.60
now 56
70
Matthew Liberatore
50.4075.60
now 57
62
Winshigher is better
David Peterson
.8006.20
now 3
25
Matthew Liberatore
.8006.20
now 3
25

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

If you already own them — trade angle
SellDavid Peterson — sell.conf 0.86
SellMatthew Liberatore — sell.conf 0.90
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