MLB Daily DeltaWeek 20 · August 8, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Portrait of Shane Baz
Shane Baz
BAL · 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); Shane Baz 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
Shane Baz
96.0
Swinging-Strike %lg 11.0% · higher = better
David Peterson
9.7%
Shane Baz
10.6%
Strikeout %lg 22.0% · higher = better
David Peterson
18.5%
Shane Baz
20.1%
Chase %lg 28.5% · higher = better
David Peterson
28.8%
Shane Baz
30.2%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
41.5%
Shane Baz
42.1%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.7%
Shane Baz
6.6%
xwOBA Allowedlg .315 · lower = better
David Peterson
.341
Shane Baz
.320
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
3.855.56
lg xERA 4.10
now 5.18
4.66
Shane Baz
3.855.56
lg xERA 4.10
now 4.48
4.23
WHIPlower is better
David Peterson
1.311.67
now 1.59
1.43
Shane Baz
1.311.67
now 1.43
1.39

Volume · rest of season
Strikeoutshigher is better
David Peterson
4065
now 56
38
Shane Baz
4065
now 57
37
Winshigher is better
David Peterson
.2003.80
now 3
13
Shane Baz
.2003.80
now 2
12

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

If you already own them — trade angle
SellDavid Peterson — sell.conf 0.81
Hold · leans sellShane Baz — hold.conf 0.60
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