MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Adrian Houser
Adrian Houser
SF · 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 1–1, 2 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
▶
◀
WHIP
W
SV n/a

Adrian Houser wins 1 (WHIP); Martín Pérez 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
Adrian Houser
95.7
Martín Pérez
89.9
Swinging-Strike %lg 11.0% · higher = better
Adrian Houser
8.4%
Martín Pérez
9.1%
Strikeout %lg 22.0% · higher = better
Adrian Houser
16.0%
Martín Pérez
17.1%
Chase %lg 28.5% · higher = better
Adrian Houser
25.8%
Martín Pérez
27.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Adrian Houser
42.0%
Martín Pérez
35.0%
Barrel % Allowedlg 8.0% · lower = better
Adrian Houser
8.7%
Martín Pérez
4.7%
xwOBA Allowedlg .315 · lower = better
Adrian Houser
.339
Martín Pérez
.325
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
Adrian Houser
26.71
lg xERA 4.10
now 5.59
4.65
Martín Pérez
26.71
lg xERA 4.10
now 2.79
4.36
WHIPlower is better
Adrian Houser
.9001.76
now 1.56
1.35
Martín Pérez
.9001.76
now 1.06
1.39

Volume · rest of season
Strikeoutshigher is better
Adrian Houser
4058.80
now 35
0
Martín Pérez
4058.80
now 42
0
Winshigher is better
Adrian Houser
.0004.20
now 2
0–0
Martín Pérez
.0004.20
now 3
0–0

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

If you already own them — trade angle
SellAdrian Houser — sell.conf 0.81
Sell HighMartín Pérez — sell high. His value is peaking; good time to trade him.conf 0.95
Tweet