MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Mitch Keller
Mitch Keller
PIT · P
Change to
Ryan Feltner
COL · 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

Mitch Keller wins 1 (WHIP); Ryan Feltner 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
Mitch Keller
93.3
Ryan Feltner
94.8
Swinging-Strike %lg 11.0% · higher = better
Mitch Keller
9.7%
Ryan Feltner
11.4%
Strikeout %lg 22.0% · higher = better
Mitch Keller
17.7%
Ryan Feltner
16.8%
Chase %lg 28.5% · higher = better
Mitch Keller
29.4%
Ryan Feltner
26.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Mitch Keller
42.3%
Ryan Feltner
36.2%
Barrel % Allowedlg 8.0% · lower = better
Mitch Keller
7.4%
Ryan Feltner
9.8%
xwOBA Allowedlg .315 · lower = better
Mitch Keller
.355
Ryan Feltner
.339
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
Mitch Keller
4.095.27
lg xERA 4.10
now 4.35
5.01
Ryan Feltner
4.095.27
lg xERA 4.10
now 4.85
4.65
WHIPlower is better
Mitch Keller
1.061.55
now 1.17
1.38
Ryan Feltner
1.061.55
now 1.31
1.44

Volume · rest of season
Strikeoutshigher is better
Mitch Keller
4071.40
now 51
0
Ryan Feltner
4071.40
now 19
0
Winshigher is better
Mitch Keller
.0007
now 5
0–0
Ryan Feltner
.0007
now 2
0–0

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

If you already own them — trade angle
SellMitch Keller — sell.conf 0.90
SellRyan Feltner — sell.conf 0.81
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