MLB Daily DeltaWeek 25 · September 11, 2026
Portrait of Ian Seymour
Ian Seymour
TB · P
Change to
Portrait of Tim Mayza
Tim Mayza
PHI · 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

Ian Seymour wins 1 (WHIP); Tim Mayza 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
Ian Seymour
91.4
Tim Mayza
94.6
Swinging-Strike %lg 11.0% · higher = better
Ian Seymour
14.9%
Tim Mayza
10.7%
Strikeout %lg 22.0% · higher = better
Ian Seymour
28.8%
Tim Mayza
24.2%
Chase %lg 28.5% · higher = better
Ian Seymour
35.1%
Tim Mayza
27.8%
Hard-Hit % Allowedlg 40.0% · lower = better
Ian Seymour
36.2%
Tim Mayza
44.4%
Barrel % Allowedlg 8.0% · lower = better
Ian Seymour
10.0%
Tim Mayza
6.5%
xwOBA Allowedlg .315 · lower = better
Ian Seymour
.295
Tim Mayza
.283
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
Ian Seymour
2.805.19
lg xERA 4.10
now 4.66
3.63
Tim Mayza
2.805.19
lg xERA 4.10
now 3.62
3.33
WHIPlower is better
Ian Seymour
.9001.40
now 1.28
1.15
Tim Mayza
.9001.40
now 0.99
1.20

Volume · rest of season
Strikeoutshigher is better
Ian Seymour
4042.80
now 32
5
Tim Mayza
4042.80
now 26
5
Winshigher is better
Ian Seymour
.0004.20
now 3
01
Tim Mayza
.0004.20
now 1
00

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

If you already own them — trade angle
BuyIan Seymour — buy.conf 0.74
BuyTim Mayza — buy.conf 0.83
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