MLB Daily DeltaWeek 25 · September 11, 2026
Carson Seymour
SF · P
Change to
Cionel Pérez
NYM · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 00, 4 even. Take whoever fills a bigger need.

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

Carson Seymour wins 0 (none); Cionel Pérez wins 0 (none); 4 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Carson Seymour
97.1
Cionel Pérez
96.9
Swinging-Strike %lg 11.0% · higher = better
Carson Seymour
10.3%
Cionel Pérez
11.6%
Strikeout %lg 22.0% · higher = better
Carson Seymour
16.2%
Cionel Pérez
22.7%
Chase %lg 28.5% · higher = better
Carson Seymour
23.6%
Cionel Pérez
30.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Carson Seymour
39.2%
Cionel Pérez
50.0%
Barrel % Allowedlg 8.0% · lower = better
Carson Seymour
10.1%
Cionel Pérez
12.9%
xwOBA Allowedlg .315 · lower = better
Carson Seymour
.395
Cionel Pérez
.346
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
Carson Seymour
28.25
lg xERA 4.10
now 9.00
3.70
Cionel Pérez
28.25
lg xERA 4.10
now 5.82
3.70
WHIPlower is better
Carson Seymour
.9002.55
now 2.33
1.24
Cionel Pérez
.9002.55
now 1.59
1.24

Volume · rest of season
Strikeoutshigher is better
Carson Seymour
4015.60
now 1
2
Cionel Pérez
4015.60
now 10
2
Winshigher is better
Carson Seymour
.0002.80
now 0
00
Cionel Pérez
.0002.80
now 2
01

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

If you already own them — trade angle
Hold · wait & seeCarson Seymour — hold.conf 0.50
Hold · wait & seeCionel Pérez — hold.conf 0.50
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