MLB Daily DeltaWeek 25 · September 10, 2026
Quinn Mathews
STL · P
Change to
Sean Sullivan
COL · 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

Quinn Mathews wins 0 (none); Sean Sullivan 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
Quinn Mathews
93.6
Sean Sullivan
87.6
Swinging-Strike %lg 11.0% · higher = better
Quinn Mathews
11.7%
Sean Sullivan
7.7%
Strikeout %lg 22.0% · higher = better
Quinn Mathews
20.4%
Sean Sullivan
14.0%
Chase %lg 28.5% · higher = better
Quinn Mathews
26.9%
Sean Sullivan
28.1%
Hard-Hit % Allowedlg 40.0% · lower = better
Quinn Mathews
36.2%
Sean Sullivan
34.5%
Barrel % Allowedlg 8.0% · lower = better
Quinn Mathews
2.1%
Sean Sullivan
9.5%
xwOBA Allowedlg .315 · lower = better
Quinn Mathews
.291
Sean Sullivan
.335
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
Quinn Mathews
25.74
lg xERA 4.10
now 3.60
4.10
Sean Sullivan
25.74
lg xERA 4.10
now 0.00
4.10
WHIPlower is better
Quinn Mathews
.9002.25
now 1.80
1.30
Sean Sullivan
.9002.25
now 0.67
1.30

Volume · rest of season
Strikeoutshigher is better
Quinn Mathews
4011.60
now 3
6
Sean Sullivan
4011.60
now 2
6
Winshigher is better
Quinn Mathews
.000.480
now 0
00
Sean Sullivan
.000.480
now 0
00

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

If you already own them — trade angle
Buy LowQuinn Mathews — buy low. The dip is a window to acquire.conf 0.78
Hold · wait & seeSean Sullivan — hold.conf 0.55
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