MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Aaron Ashby
Aaron Ashby
MIL · 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 1–1, 2 even. Take whoever fills a bigger need.

Head-to-head
K
◀
ERA
WHIP
▶
W
SV n/a

Aaron Ashby wins 1 (ERA); Tim Mayza 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
Aaron Ashby
97.3
Tim Mayza
94.4
Swinging-Strike %lg 11.0% · higher = better
Aaron Ashby
12.8%
Tim Mayza
10.1%
Strikeout %lg 22.0% · higher = better
Aaron Ashby
30.2%
Tim Mayza
23.6%
Chase %lg 28.5% · higher = better
Aaron Ashby
29.4%
Tim Mayza
27.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Aaron Ashby
40.9%
Tim Mayza
45.2%
Barrel % Allowedlg 8.0% · lower = better
Aaron Ashby
5.0%
Tim Mayza
6.4%
xwOBA Allowedlg .315 · lower = better
Aaron Ashby
.271
Tim Mayza
.288
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
Aaron Ashby
24.27
lg xERA 4.10
now 2.00
3.06
Tim Mayza
24.27
lg xERA 4.10
now 3.62
3.47
WHIPlower is better
Aaron Ashby
.9001.44
now 1.28
1.31
Tim Mayza
.9001.44
now 0.99
1.24

Volume · rest of season
Strikeoutshigher is better
Aaron Ashby
4071.40
now 51
0
Tim Mayza
4071.40
now 26
0
Winshigher is better
Aaron Ashby
.00012.60
now 9
0–0
Tim Mayza
.00012.60
now 1
0–0

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

If you already own them — trade angle
BuyAaron Ashby — buy.conf 0.91
BuyTim Mayza — buy.conf 0.79
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