MLB Daily DeltaWeek 18 · July 27, 2026
Portrait of Michael Wacha
Michael Wacha
KC · P
Change to
Portrait of Stephen Kolek
Stephen Kolek
KC · 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

Michael Wacha wins 2 (K, WHIP); Stephen Kolek wins 2 (ERA, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Michael Wacha
93.1
Stephen Kolek
94.2
Swinging-Strike %lg 11.0% · higher = better
Michael Wacha
10.2%
Stephen Kolek
9.6%
Strikeout %lg 22.0% · higher = better
Michael Wacha
19.3%
Stephen Kolek
15.2%
Chase %lg 28.5% · higher = better
Michael Wacha
30.1%
Stephen Kolek
26.7%
Hard-Hit % Allowedlg 40.0% · lower = better
Michael Wacha
36.3%
Stephen Kolek
36.9%
Barrel % Allowedlg 8.0% · lower = better
Michael Wacha
6.6%
Stephen Kolek
6.8%
xwOBA Allowedlg .315 · lower = better
Michael Wacha
.318
Stephen Kolek
.303
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
Michael Wacha
2.844.59
lg xERA 4.10
now 3.23
4.20
Stephen Kolek
2.844.59
lg xERA 4.10
now 3.48
3.84
WHIPlower is better
Michael Wacha
.9001.47
now 1.12
1.30
Stephen Kolek
.9001.47
now 0.94
1.32

Volume · rest of season
Strikeoutshigher is better
Michael Wacha
4083.40
now 65
47
Stephen Kolek
4083.40
now 19
29
Winshigher is better
Michael Wacha
.4007.60
now 4
24
Stephen Kolek
.4007.60
now 3
36

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

If you already own them — trade angle
Sell HighMichael Wacha — sell high. His value is peaking; good time to trade him.conf 0.91
Hold · leans buyStephen Kolek — hold.conf 0.60
Tweet