MLB Daily DeltaWeek 14 · June 28, 2026
Portrait of Jack Leiter
Jack Leiter
TEX · P
Change to
Portrait of Luis Castillo
Luis Castillo
SEA · P
Change to
Who's more valuable, rest of season

Too close to call.

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

Head-to-head
K
ERA
WHIP
W
SV n/a

Jack Leiter wins 2 (K, W); Luis Castillo wins 2 (ERA, WHIP); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Jack Leiter
96.7
Luis Castillo
95.3
Swinging-Strike %lg 11.0% · higher = better
Jack Leiter
12.2%
Luis Castillo
13.0%
Strikeout %lg 22.0% · higher = better
Jack Leiter
23.4%
Luis Castillo
21.5%
Chase %lg 28.5% · higher = better
Jack Leiter
30.4%
Luis Castillo
32.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Leiter
39.9%
Luis Castillo
43.2%
Barrel % Allowedlg 8.0% · lower = better
Jack Leiter
10.3%
Luis Castillo
9.8%
xwOBA Allowedlg .315 · lower = better
Jack Leiter
.337
Luis Castillo
.331
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 Leiter
3.866.01
lg xERA 4.10
now 4.34
4.52
Luis Castillo
3.866.01
lg xERA 4.10
now 5.53
4.39
WHIPlower is better
Jack Leiter
1.261.52
now 1.33
1.37
Luis Castillo
1.261.52
now 1.45
1.34

Volume · rest of season
Strikeoutshigher is better
Jack Leiter
43.20100.80
now 74
88
Luis Castillo
43.20100.80
now 56
79
Winshigher is better
Jack Leiter
.8006.20
now 3
25
Luis Castillo
.8006.20
now 2
24

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

If you already own them — trade angle
SellJack Leiter — sell.conf 0.74
SellLuis Castillo — sell.conf 0.69
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