MLB Daily DeltaWeek 15 · July 7, 2026
Portrait of Luis Severino
Luis Severino
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 Severino wins 2 (K, ERA); Martín Pérez wins 2 (WHIP, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Luis Severino
96.9
Martín Pérez
90.0
Swinging-Strike %lg 11.0% · higher = better
Luis Severino
10.9%
Martín Pérez
9.3%
Strikeout %lg 22.0% · higher = better
Luis Severino
24.0%
Martín Pérez
18.6%
Chase %lg 28.5% · higher = better
Luis Severino
31.3%
Martín Pérez
26.2%
Hard-Hit % Allowedlg 40.0% · lower = better
Luis Severino
38.7%
Martín Pérez
36.3%
Barrel % Allowedlg 8.0% · lower = better
Luis Severino
8.7%
Martín Pérez
6.8%
xwOBA Allowedlg .315 · lower = better
Luis Severino
.318
Martín Pérez
.330
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 Severino
2.145.06
lg xERA 4.10
now 4.16
4.18
Martín Pérez
2.145.06
lg xERA 4.10
now 2.79
4.41
WHIPlower is better
Luis Severino
.9001.63
now 1.47
1.41
Martín Pérez
.9001.63
now 1.06
1.37

Volume · rest of season
Strikeoutshigher is better
Luis Severino
4081.20
now 65
70
Martín Pérez
4081.20
now 42
49
Winshigher is better
Luis Severino
.0006.60
now 2
13
Martín Pérez
.0006.60
now 3
25

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

If you already own them — trade angle
Hold · steadyLuis Severino — 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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