MLB Daily DeltaWeek 14 · June 27, 2026
Portrait of Luis Castillo
Luis Castillo
SEA · P
Change to
Portrait of Martín Pérez
Martín Pérez
ATL · P
Change to
Who's more valuable, rest of season

Martín Pérez.

He projects to help you in more roto categories the rest of the way — ERA and wins.

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

Martín Pérez wins 2 categories (ERA, W); Luis Castillo wins 1 (K); 1 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Luis Castillo
95.2
Martín Pérez
90.0
Swinging-Strike %lg 11.0% · higher = better
Luis Castillo
13.2%
Martín Pérez
9.7%
Strikeout %lg 22.0% · higher = better
Luis Castillo
21.8%
Martín Pérez
20.7%
Chase %lg 28.5% · higher = better
Luis Castillo
32.0%
Martín Pérez
26.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Luis Castillo
44.7%
Martín Pérez
37.3%
Barrel % Allowedlg 8.0% · lower = better
Luis Castillo
9.7%
Martín Pérez
6.5%
xwOBA Allowedlg .315 · lower = better
Luis Castillo
.333
Martín Pérez
.313
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
Luis Castillo
26.63
lg xERA 4.10
now 5.53
4.43
Martín Pérez
26.63
lg xERA 4.10
now 2.79
4.02
WHIPlower is better
Luis Castillo
.9001.61
now 1.45
1.34
Martín Pérez
.9001.61
now 1.06
1.34

Volume · rest of season
Strikeoutshigher is better
Luis Castillo
4095.20
now 56
80
Martín Pérez
4095.20
now 42
54
Winshigher is better
Luis Castillo
.4007.60
now 2
24
Martín Pérez
.4007.60
now 3
36

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

If you already own them — trade angle
Hold · leans sellLuis Castillo — hold.conf 0.60
Sell HighMartín Pérez — sell high. His value is peaking; good time to trade him.conf 0.95
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