MLB Daily DeltaWeek 18 · July 27, 2026
Chase Petty
CIN · P
Change to
Portrait of Merrill Kelly
Merrill Kelly
AZ · 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

Chase Petty wins 2 (ERA, WHIP); Merrill Kelly wins 2 (K, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Chase Petty
97.0
Merrill Kelly
92.2
Swinging-Strike %lg 11.0% · higher = better
Chase Petty
9.8%
Merrill Kelly
10.2%
Strikeout %lg 22.0% · higher = better
Chase Petty
11.1%
Merrill Kelly
14.4%
Chase %lg 28.5% · higher = better
Chase Petty
28.6%
Merrill Kelly
34.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Chase Petty
36.2%
Merrill Kelly
45.0%
Barrel % Allowedlg 8.0% · lower = better
Chase Petty
7.4%
Merrill Kelly
13.5%
xwOBA Allowedlg .315 · lower = better
Chase Petty
.343
Merrill Kelly
.400
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
Chase Petty
3.207.25
lg xERA 4.10
now 6.35
4.10
Merrill Kelly
3.207.25
lg xERA 4.10
now 5.06
6.17
WHIPlower is better
Chase Petty
1.151.55
now 1.24
1.30
Merrill Kelly
1.151.55
now 1.46
1.43

Volume · rest of season
Strikeoutshigher is better
Chase Petty
4048.20
now 2
7
Merrill Kelly
4048.20
now 33
35
Winshigher is better
Chase Petty
.0008.40
now 0
00
Merrill Kelly
.0008.40
now 5
36

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

If you already own them — trade angle
Sell HighChase Petty — sell high. His value is peaking; good time to trade him.conf 0.88
SellMerrill Kelly — sell.conf 0.90
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