MLB Daily DeltaWeek 19 · July 30, 2026
Luis Morales
ATH · P
Change to
Portrait of Martín Pérez
Martín Pérez
ATL · 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

Luis Morales wins 2 (ERA, WHIP); Martín Pérez wins 2 (K, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Luis Morales
97.0
Martín Pérez
89.9
Swinging-Strike %lg 11.0% · higher = better
Luis Morales
8.7%
Martín Pérez
9.1%
Strikeout %lg 22.0% · higher = better
Luis Morales
15.8%
Martín Pérez
18.5%
Chase %lg 28.5% · higher = better
Luis Morales
27.0%
Martín Pérez
25.6%
Hard-Hit % Allowedlg 40.0% · lower = better
Luis Morales
42.0%
Martín Pérez
38.1%
Barrel % Allowedlg 8.0% · lower = better
Luis Morales
12.0%
Martín Pérez
6.4%
xwOBA Allowedlg .315 · lower = better
Luis Morales
.419
Martín Pérez
.332
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 Morales
28.25
lg xERA 4.10
now 14.46
4.10
Martín Pérez
28.25
lg xERA 4.10
now 2.79
4.49
WHIPlower is better
Luis Morales
.9002.55
now 3.11
1.30
Martín Pérez
.9002.55
now 1.06
1.38

Volume · rest of season
Strikeoutshigher is better
Luis Morales
4056
now 7
28
Martín Pérez
4056
now 42
34
Winshigher is better
Luis Morales
.0004.20
now 0
00
Martín Pérez
.0004.20
now 3
23

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

If you already own them — trade angle
Hold · wait & seeLuis Morales — hold.conf 0.55
Sell HighMartín Pérez — sell high. His value is peaking; good time to trade him.conf 0.95
Tweet