MLB Daily DeltaWeek 18 · July 27, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Mitch Bratt
AZ · 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); Mitch Bratt 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
Mitch Bratt
91.5
Swinging-Strike %lg 11.0% · higher = better
David Peterson
10.0%
Mitch Bratt
8.0%
Strikeout %lg 22.0% · higher = better
David Peterson
18.2%
Mitch Bratt
13.0%
Chase %lg 28.5% · higher = better
David Peterson
29.0%
Mitch Bratt
27.9%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
43.3%
Mitch Bratt
38.2%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.5%
Mitch Bratt
9.1%
xwOBA Allowedlg .315 · lower = better
David Peterson
.349
Mitch Bratt
.345
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
3.346.76
lg xERA 4.10
now 5.18
4.85
Mitch Bratt
3.346.76
lg xERA 4.10
now 6.00
4.10
WHIPlower is better
David Peterson
1.151.82
now 1.59
1.45
Mitch Bratt
1.151.82
now 1.67
1.30

Volume · rest of season
Strikeoutshigher is better
David Peterson
4077.20
now 56
49
Mitch Bratt
4077.20
now 3
18
Winshigher is better
David Peterson
.0004.20
now 3
23
Mitch Bratt
.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 0.90
Hold · wait & seeMitch Bratt — hold.conf 0.50
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