MLB Daily DeltaWeek 19 · August 4, 2026
Portrait of Jack Perkins
Jack Perkins
ATH · P
Change to
Portrait of Ryne Stanek
Ryne Stanek
STL · 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); Ryne Stanek 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
Ryne Stanek
98.1
Swinging-Strike %lg 11.0% · higher = better
Jack Perkins
13.6%
Ryne Stanek
14.2%
Strikeout %lg 22.0% · higher = better
Jack Perkins
26.8%
Ryne Stanek
24.3%
Chase %lg 28.5% · higher = better
Jack Perkins
34.1%
Ryne Stanek
29.6%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Perkins
37.6%
Ryne Stanek
34.5%
Barrel % Allowedlg 8.0% · lower = better
Jack Perkins
8.2%
Ryne Stanek
6.9%
xwOBA Allowedlg .315 · lower = better
Jack Perkins
.310
Ryne Stanek
.305
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
2.966.30
lg xERA 4.10
now 5.46
3.90
Ryne Stanek
2.966.30
lg xERA 4.10
now 5.56
3.70
WHIPlower is better
Jack Perkins
.9901.98
now 1.21
1.27
Ryne Stanek
.9901.98
now 1.76
1.25

Volume · rest of season
Strikeoutshigher is better
Jack Perkins
4038.60
now 33
22
Ryne Stanek
4038.60
now 30
21
Winshigher is better
Jack Perkins
.0002.80
now 2
12
Ryne Stanek
.0002.80
now 1
01
Saveshigher is better
Jack Perkins
.0004.40
now 3
13
Ryne Stanek
.0004.40
now 1
01
If you already own them — trade angle
Buy LowJack Perkins — buy low. The dip is a window to acquire.conf 0.90
Hold · wait & seeRyne Stanek — hold.conf 0.50
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