MLB Daily DeltaWeek 18 · July 27, 2026
Portrait of Brad Keller
Brad Keller
PHI · P
Change to
Portrait of Jack Perkins
Jack Perkins
ATH · 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

Brad Keller wins 2 (ERA, WHIP); Jack Perkins wins 2 (K, W); 1 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Brad Keller
97.0
Jack Perkins
96.0
Swinging-Strike %lg 11.0% · higher = better
Brad Keller
10.1%
Jack Perkins
13.4%
Strikeout %lg 22.0% · higher = better
Brad Keller
23.7%
Jack Perkins
26.7%
Chase %lg 28.5% · higher = better
Brad Keller
28.0%
Jack Perkins
33.6%
Hard-Hit % Allowedlg 40.0% · lower = better
Brad Keller
31.8%
Jack Perkins
38.1%
Barrel % Allowedlg 8.0% · lower = better
Brad Keller
4.5%
Jack Perkins
7.9%
xwOBA Allowedlg .315 · lower = better
Brad Keller
.284
Jack Perkins
.316
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
Brad Keller
2.936.18
lg xERA 4.10
now 3.65
3.68
Jack Perkins
2.936.18
lg xERA 4.10
now 5.46
4.03
WHIPlower is better
Brad Keller
1.071.35
now 1.14
1.25
Jack Perkins
1.071.35
now 1.21
1.28

Volume · rest of season
Strikeoutshigher is better
Brad Keller
4039
now 28
18
Jack Perkins
4039
now 33
25
Winshigher is better
Brad Keller
.5202.48
now 2
12
Jack Perkins
.5202.48
now 2
12
Saveshigher is better
Brad Keller
.6004.40
now 3
23
Jack Perkins
.6004.40
now 3
23
If you already own them — trade angle
Hold · wait & seeBrad Keller — hold.conf 0.50
Buy LowJack Perkins — buy low. The dip is a window to acquire.conf 0.90
Tweet