MLB Daily DeltaWeek 27 · September 29, 2026
Portrait of Tim Mayza
Tim Mayza
PHI · P
Change to
Portrait of Will Dion
Will Dion
WSH · 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

Tim Mayza wins 1 (WHIP); Will Dion 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
Tim Mayza
94.4
Will Dion
91.1
Swinging-Strike %lg 11.0% · higher = better
Tim Mayza
10.1%
Will Dion
13.5%
Strikeout %lg 22.0% · higher = better
Tim Mayza
23.6%
Will Dion
27.4%
Chase %lg 28.5% · higher = better
Tim Mayza
27.0%
Will Dion
34.5%
Hard-Hit % Allowedlg 40.0% · lower = better
Tim Mayza
45.2%
Will Dion
32.8%
Barrel % Allowedlg 8.0% · lower = better
Tim Mayza
6.4%
Will Dion
7.0%
xwOBA Allowedlg .315 · lower = better
Tim Mayza
.288
Will Dion
.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
Tim Mayza
2.297.06
lg xERA 4.10
now 3.62
3.47
Will Dion
2.297.06
lg xERA 4.10
now 6.00
3.35
WHIPlower is better
Tim Mayza
.9002.17
now 0.99
1.24
Will Dion
.9002.17
now 1.83
1.25

Volume · rest of season
Strikeoutshigher is better
Tim Mayza
4036.40
now 26
0
Will Dion
4036.40
now 8
0
Winshigher is better
Tim Mayza
.0001.48
now 1
0–0
Will Dion
.0001.48
now 0
0–0

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

If you already own them — trade angle
BuyTim Mayza — buy.conf 0.79
BuyWill Dion — buy.conf 0.82
Tweet