MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Framber Valdez
Framber Valdez
DET · 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

Framber Valdez wins 1 (ERA); Martín Pérez wins 1 (WHIP); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Framber Valdez
94.7
Martín Pérez
89.9
Swinging-Strike %lg 11.0% · higher = better
Framber Valdez
9.6%
Martín Pérez
9.1%
Strikeout %lg 22.0% · higher = better
Framber Valdez
17.8%
Martín Pérez
17.1%
Chase %lg 28.5% · higher = better
Framber Valdez
30.8%
Martín Pérez
27.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Framber Valdez
41.9%
Martín Pérez
35.0%
Barrel % Allowedlg 8.0% · lower = better
Framber Valdez
5.5%
Martín Pérez
4.7%
xwOBA Allowedlg .315 · lower = better
Framber Valdez
.321
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
Framber Valdez
2.155.03
lg xERA 4.10
now 4.39
4.28
Martín Pérez
2.155.03
lg xERA 4.10
now 2.79
4.36
WHIPlower is better
Framber Valdez
.9201.54
now 1.32
1.40
Martín Pérez
.9201.54
now 1.06
1.39

Volume · rest of season
Strikeoutshigher is better
Framber Valdez
4075.60
now 54
0
Martín Pérez
4075.60
now 42
0
Winshigher is better
Framber Valdez
.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
Hold · leans sellFramber Valdez — hold.conf 0.60
Sell HighMartín Pérez — sell high. His value is peaking; good time to trade him.conf 0.95
Tweet