MLB Daily DeltaWeek 27 · September 30, 2026
Portrait of Brandon Sproat
Brandon Sproat
MIL · P
Change to
Portrait of Mitch Keller
Mitch Keller
PIT · 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

Brandon Sproat wins 1 (ERA); Mitch Keller 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
Brandon Sproat
96.8
Mitch Keller
93.3
Swinging-Strike %lg 11.0% · higher = better
Brandon Sproat
11.4%
Mitch Keller
9.7%
Strikeout %lg 22.0% · higher = better
Brandon Sproat
23.9%
Mitch Keller
17.7%
Chase %lg 28.5% · higher = better
Brandon Sproat
25.4%
Mitch Keller
29.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Brandon Sproat
42.7%
Mitch Keller
42.3%
Barrel % Allowedlg 8.0% · lower = better
Brandon Sproat
8.5%
Mitch Keller
7.4%
xwOBA Allowedlg .315 · lower = better
Brandon Sproat
.341
Mitch Keller
.355
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
Brandon Sproat
3.597
lg xERA 4.10
now 6.24
4.70
Mitch Keller
3.597
lg xERA 4.10
now 4.35
5.02
WHIPlower is better
Brandon Sproat
1.031.67
now 1.53
1.43
Mitch Keller
1.031.67
now 1.17
1.38

Volume · rest of season
Strikeoutshigher is better
Brandon Sproat
4072.80
now 52
0
Mitch Keller
4072.80
now 51
0
Winshigher is better
Brandon Sproat
.0007
now 1
0–0
Mitch Keller
.0007
now 5
0–0

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

If you already own them — trade angle
SellBrandon Sproat — sell.conf 0.83
SellMitch Keller — sell.conf 0.90
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