MLB Daily DeltaWeek 27 · September 30, 2026
Chase Petty
CIN · P
Change to
Robert Stock
NYM · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 0–0, 4 even. Take whoever fills a bigger need.

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

Chase Petty wins 0 (none); Robert Stock wins 0 (none); 4 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Chase Petty
96.9
Robert Stock
95.8
Swinging-Strike %lg 11.0% · higher = better
Chase Petty
9.4%
Robert Stock
11.8%
Strikeout %lg 22.0% · higher = better
Chase Petty
10.8%
Robert Stock
19.7%
Chase %lg 28.5% · higher = better
Chase Petty
27.9%
Robert Stock
28.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Chase Petty
37.5%
Robert Stock
36.4%
Barrel % Allowedlg 8.0% · lower = better
Chase Petty
8.9%
Robert Stock
8.1%
xwOBA Allowedlg .315 · lower = better
Chase Petty
.361
Robert Stock
.343
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
28.17
lg xERA 4.10
now 6.35
4.10
Robert Stock
28.17
lg xERA 4.10
now 1.80
4.10
WHIPlower is better
Chase Petty
.9001.58
now 1.24
1.30
Robert Stock
.9001.58
now 0.60
1.30

Volume · rest of season
Strikeoutshigher is better
Chase Petty
409.60
now 2
0
Robert Stock
409.60
now 4
0
Winshigher is better
Chase Petty
.000.480
now 0
0–0
Robert Stock
.000.480
now 0
0–0

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 0.91
Hold · wait & seeRobert Stock — hold.conf 0.55
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