MLB Daily DeltaWeek 14 · June 29, 2026
Matt Waldron
SD · 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 22. Take whoever fills a bigger need.

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

Matt Waldron wins 2 (ERA, WHIP); Mitch Keller wins 2 (K, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Matt Waldron
91.9
Mitch Keller
93.4
Swinging-Strike %lg 11.0% · higher = better
Matt Waldron
8.8%
Mitch Keller
9.9%
Strikeout %lg 22.0% · higher = better
Matt Waldron
20.0%
Mitch Keller
18.2%
Chase %lg 28.5% · higher = better
Matt Waldron
31.7%
Mitch Keller
29.5%
Hard-Hit % Allowedlg 40.0% · lower = better
Matt Waldron
39.2%
Mitch Keller
41.2%
Barrel % Allowedlg 8.0% · lower = better
Matt Waldron
7.6%
Mitch Keller
6.3%
xwOBA Allowedlg .315 · lower = better
Matt Waldron
.306
Mitch Keller
.342
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
Matt Waldron
2.338.25
lg xERA 4.10
now 8.49
4.09
Mitch Keller
2.338.25
lg xERA 4.10
now 4.35
4.62
WHIPlower is better
Matt Waldron
.9501.93
now 1.71
1.30
Mitch Keller
.9501.93
now 1.17
1.38

Volume · rest of season
Strikeoutshigher is better
Matt Waldron
4079.40
now 22
55
Mitch Keller
4079.40
now 51
63
Winshigher is better
Matt Waldron
.00010.80
now 1
23
Mitch Keller
.00010.80
now 5
48

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

If you already own them — trade angle
Buy LowMatt Waldron — buy low. The dip is a window to acquire.conf 0.90
SellMitch Keller — sell.conf 0.79
Tweet