MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Jack Perkins
Jack Perkins
ATH · P
Change to
Portrait of Luis Medina
Luis Medina
ATH · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 1–1, 2 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
▶
◀
WHIP
W
SV n/a

Jack Perkins wins 1 (WHIP); Luis Medina wins 1 (ERA); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Jack Perkins
95.7
Luis Medina
97.7
Swinging-Strike %lg 11.0% · higher = better
Jack Perkins
12.7%
Luis Medina
14.1%
Strikeout %lg 22.0% · higher = better
Jack Perkins
25.2%
Luis Medina
29.3%
Chase %lg 28.5% · higher = better
Jack Perkins
33.7%
Luis Medina
26.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Perkins
36.9%
Luis Medina
38.7%
Barrel % Allowedlg 8.0% · lower = better
Jack Perkins
8.5%
Luis Medina
7.7%
xwOBA Allowedlg .315 · lower = better
Jack Perkins
.309
Luis Medina
.303
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
26.49
lg xERA 4.10
now 5.46
3.91
Luis Medina
26.49
lg xERA 4.10
now 2.88
3.80
WHIPlower is better
Jack Perkins
1.131.43
now 1.21
1.33
Luis Medina
1.131.43
now 1.20
1.36

Volume · rest of season
Strikeoutshigher is better
Jack Perkins
4046.20
now 33
0
Luis Medina
4046.20
now 27
0
Winshigher is better
Jack Perkins
.0002.80
now 2
0–0
Luis Medina
.0002.80
now 1
0–0

SV — not applicable. Both pitch out of the rotation.

If you already own them — trade angle
Buy LowJack Perkins — buy low. The dip is a window to acquire.conf 0.90
Hold · leans buyLuis Medina — hold.conf 0.60
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