MLB Daily DeltaWeek 18 · July 28, 2026
Portrait of Jack Perkins
Jack Perkins
ATH · P
Change to
Portrait of Mitchell Parker
Mitchell Parker
WSH · 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); Mitchell Parker 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
96.0
Mitchell Parker
93.6
Swinging-Strike %lg 11.0% · higher = better
Jack Perkins
13.4%
Mitchell Parker
14.1%
Strikeout %lg 22.0% · higher = better
Jack Perkins
26.7%
Mitchell Parker
19.1%
Chase %lg 28.5% · higher = better
Jack Perkins
33.6%
Mitchell Parker
32.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Perkins
38.1%
Mitchell Parker
41.9%
Barrel % Allowedlg 8.0% · lower = better
Jack Perkins
7.9%
Mitchell Parker
8.5%
xwOBA Allowedlg .315 · lower = better
Jack Perkins
.316
Mitchell Parker
.347
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
3.166.12
lg xERA 4.10
now 5.46
4.01
Mitchell Parker
3.166.12
lg xERA 4.10
now 5.28
3.82
WHIPlower is better
Jack Perkins
1.101.35
now 1.21
1.28
Mitchell Parker
1.101.35
now 1.17
1.25

Volume · rest of season
Strikeoutshigher is better
Jack Perkins
4038.60
now 33
25
Mitchell Parker
4038.60
now 26
21
Winshigher is better
Jack Perkins
.5202.48
now 2
12
Mitchell Parker
.5202.48
now 2
12
Saveshigher is better
Jack Perkins
.0004.40
now 3
23
Mitchell Parker
.0004.40
now 1
11
If you already own them — trade angle
Buy LowJack Perkins — buy low. The dip is a window to acquire.conf 0.90
Hold · wait & seeMitchell Parker — hold.conf 0.55
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