MLB Daily DeltaWeek 18 · July 28, 2026
Portrait of Kyle Leahy
Kyle Leahy
STL · 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 11, 2 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV n/a

Kyle Leahy wins 1 (ERA); Mitch Keller wins 1 (K); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Kyle Leahy
94.1
Mitch Keller
93.4
Swinging-Strike %lg 11.0% · higher = better
Kyle Leahy
10.0%
Mitch Keller
10.1%
Strikeout %lg 22.0% · higher = better
Kyle Leahy
20.4%
Mitch Keller
17.9%
Chase %lg 28.5% · higher = better
Kyle Leahy
26.0%
Mitch Keller
30.1%
Hard-Hit % Allowedlg 40.0% · lower = better
Kyle Leahy
50.0%
Mitch Keller
42.0%
Barrel % Allowedlg 8.0% · lower = better
Kyle Leahy
10.9%
Mitch Keller
7.1%
xwOBA Allowedlg .315 · lower = better
Kyle Leahy
.347
Mitch Keller
.349
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
Kyle Leahy
4.025.06
lg xERA 4.10
now 4.25
4.79
Mitch Keller
4.025.06
lg xERA 4.10
now 4.35
4.83
WHIPlower is better
Kyle Leahy
1.011.72
now 1.56
1.36
Mitch Keller
1.011.72
now 1.17
1.36

Volume · rest of season
Strikeoutshigher is better
Kyle Leahy
4056.60
now 46
38
Mitch Keller
4056.60
now 51
39
Winshigher is better
Kyle Leahy
.4007.60
now 5
36
Mitch Keller
.4007.60
now 5
25

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

If you already own them — trade angle
SellKyle Leahy — sell.conf 0.87
SellMitch Keller — sell.conf 0.89
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