MLB Daily DeltaWeek 20 · August 9, 2026
Portrait of Mitch Keller
Mitch Keller
PIT · P
Change to
Zac Thornton
NYM · P
Change to
Who's more valuable, rest of season

Zac Thornton.

He projects to help you in more roto categories the rest of the way — ERA and WHIP. Mitch Keller’s box score looks better right now, but the luck-stripped projection flips it.

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

Zac Thornton wins 2 categories (ERA, WHIP); Mitch Keller wins 1 (W); 1 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
Zac Thornton
92.1
Swinging-Strike %lg 11.0% · higher = better
Mitch Keller
9.7%
Zac Thornton
9.7%
Strikeout %lg 22.0% · higher = better
Mitch Keller
17.7%
Zac Thornton
17.6%
Chase %lg 28.5% · higher = better
Mitch Keller
29.4%
Zac Thornton
30.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Mitch Keller
42.3%
Zac Thornton
39.8%
Barrel % Allowedlg 8.0% · lower = better
Mitch Keller
7.4%
Zac Thornton
8.8%
xwOBA Allowedlg .315 · lower = better
Mitch Keller
.355
Zac Thornton
.330
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
3.755.32
lg xERA 4.10
now 4.35
4.97
Zac Thornton
3.755.32
lg xERA 4.10
now 4.35
4.10
WHIPlower is better
Mitch Keller
1.071.47
now 1.17
1.38
Zac Thornton
1.071.47
now 1.16
1.30

Volume · rest of season
Strikeoutshigher is better
Mitch Keller
4067.40
now 51
31
Zac Thornton
4067.40
now 10
31
Winshigher is better
Mitch Keller
.0007
now 5
24
Zac Thornton
.0007
now 0
00

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

If you already own them — trade angle
SellMitch Keller — sell.conf 0.90
Sell HighZac Thornton — sell high. His value is peaking; good time to trade him.conf 0.95
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