MLB Daily DeltaWeek 19 · August 1, 2026
Portrait of Jack Perkins
Jack Perkins
ATH · P
Change to
Portrait of Michael Petersen
Michael Petersen
MIA · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 22, 1 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV

Jack Perkins wins 2 (K, SV); Michael Petersen wins 2 (ERA, WHIP); 1 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Jack Perkins
95.9
Michael Petersen
97.8
Swinging-Strike %lg 11.0% · higher = better
Jack Perkins
13.4%
Michael Petersen
13.9%
Strikeout %lg 22.0% · higher = better
Jack Perkins
26.1%
Michael Petersen
28.7%
Chase %lg 28.5% · higher = better
Jack Perkins
33.7%
Michael Petersen
32.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Perkins
37.6%
Michael Petersen
43.1%
Barrel % Allowedlg 8.0% · lower = better
Jack Perkins
7.3%
Michael Petersen
11.0%
xwOBA Allowedlg .315 · lower = better
Jack Perkins
.311
Michael Petersen
.287
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
Jack Perkins
2.906.19
lg xERA 4.10
now 5.46
3.93
Michael Petersen
2.906.19
lg xERA 4.10
now 3.63
3.69
WHIPlower is better
Jack Perkins
1.051.36
now 1.21
1.29
Michael Petersen
1.051.36
now 1.12
1.24

Volume · rest of season
Strikeoutshigher is better
Jack Perkins
4040.20
now 33
23
Michael Petersen
4040.20
now 23
15
Winshigher is better
Jack Perkins
.0002.80
now 2
12
Michael Petersen
.0002.80
now 1
01
Saveshigher is better
Jack Perkins
.0004.40
now 3
23
Michael Petersen
.0004.40
now 1
01
If you already own them — trade angle
Hold · steadyJack Perkins — hold.conf 0.60
Hold · wait & seeMichael Petersen — hold.conf 0.50
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