MLB Daily DeltaWeek 20 · August 9, 2026
Portrait of Aaron Nola
Aaron Nola
PHI · P
Change to
Portrait of Stephen Kolek
Stephen Kolek
KC · P
Change to
Who's more valuable, rest of season

Stephen Kolek.

He projects to help you in more roto categories the rest of the way — ERA, WHIP, and wins.

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

Stephen Kolek wins 3 categories (ERA, WHIP, W); Aaron Nola wins 1 (K); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Aaron Nola
92.3
Stephen Kolek
94.2
Swinging-Strike %lg 11.0% · higher = better
Aaron Nola
12.4%
Stephen Kolek
9.6%
Strikeout %lg 22.0% · higher = better
Aaron Nola
23.2%
Stephen Kolek
15.2%
Chase %lg 28.5% · higher = better
Aaron Nola
32.2%
Stephen Kolek
26.7%
Hard-Hit % Allowedlg 40.0% · lower = better
Aaron Nola
41.5%
Stephen Kolek
36.9%
Barrel % Allowedlg 8.0% · lower = better
Aaron Nola
10.0%
Stephen Kolek
6.8%
xwOBA Allowedlg .315 · lower = better
Aaron Nola
.320
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
Aaron Nola
2.656.38
lg xERA 4.10
now 5.55
4.23
Stephen Kolek
2.656.38
lg xERA 4.10
now 3.48
3.82
WHIPlower is better
Aaron Nola
.9001.57
now 1.39
1.33
Stephen Kolek
.9001.57
now 0.94
1.32

Volume · rest of season
Strikeoutshigher is better
Aaron Nola
4082
now 64
41
Stephen Kolek
4082
now 19
23
Winshigher is better
Aaron Nola
.0006.60
now 3
13
Stephen Kolek
.0006.60
now 3
25

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

If you already own them — trade angle
Buy LowAaron Nola — buy low. The dip is a window to acquire.conf 0.90
Hold · leans buyStephen Kolek — hold.conf 0.60
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