MLB Daily DeltaWeek 19 · August 5, 2026
Cionel Pérez
NYM · P
Change to
Portrait of Grant Wolfram
Grant Wolfram
BAL · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 11, 2 even. Take whoever fills a bigger need.

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

Cionel Pérez wins 1 (W); Grant Wolfram wins 1 (K); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Cionel Pérez
96.9
Grant Wolfram
95.4
Swinging-Strike %lg 11.0% · higher = better
Cionel Pérez
11.6%
Grant Wolfram
11.8%
Strikeout %lg 22.0% · higher = better
Cionel Pérez
22.7%
Grant Wolfram
24.5%
Chase %lg 28.5% · higher = better
Cionel Pérez
30.0%
Grant Wolfram
30.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Cionel Pérez
50.0%
Grant Wolfram
36.5%
Barrel % Allowedlg 8.0% · lower = better
Cionel Pérez
12.9%
Grant Wolfram
5.2%
xwOBA Allowedlg .315 · lower = better
Cionel Pérez
.346
Grant Wolfram
.286
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
Cionel Pérez
2.856.67
lg xERA 4.10
now 5.82
3.70
Grant Wolfram
2.856.67
lg xERA 4.10
now 4.02
3.70
WHIPlower is better
Cionel Pérez
1.101.73
now 1.59
1.24
Grant Wolfram
1.101.73
now 1.53
1.24

Volume · rest of season
Strikeoutshigher is better
Cionel Pérez
4026.60
now 10
8
Grant Wolfram
4026.60
now 21
18
Winshigher is better
Cionel Pérez
.0004.20
now 2
13
Grant Wolfram
.0004.20
now 1
01

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

If you already own them — trade angle
Hold · wait & seeCionel Pérez — hold.conf 0.50
Buy LowGrant Wolfram — buy low. The dip is a window to acquire.conf 0.90
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