MLB Daily DeltaWeek 27 · September 27, 2026
Jack Dreyer
LAD · P
Change to
Portrait of Michael Petersen
Michael Petersen
MIA · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 1–1, 2 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
▶
◀
WHIP
W
SV n/a

Jack Dreyer wins 1 (WHIP); Michael Petersen wins 1 (ERA); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Jack Dreyer
94.1
Michael Petersen
98.0
Swinging-Strike %lg 11.0% · higher = better
Jack Dreyer
13.7%
Michael Petersen
15.4%
Strikeout %lg 22.0% · higher = better
Jack Dreyer
28.0%
Michael Petersen
30.7%
Chase %lg 28.5% · higher = better
Jack Dreyer
32.1%
Michael Petersen
33.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Dreyer
41.8%
Michael Petersen
42.4%
Barrel % Allowedlg 8.0% · lower = better
Jack Dreyer
7.0%
Michael Petersen
11.9%
xwOBA Allowedlg .315 · lower = better
Jack Dreyer
.290
Michael Petersen
.284
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
Jack Dreyer
2.443.97
lg xERA 4.10
now 2.78
3.52
Michael Petersen
2.443.97
lg xERA 4.10
now 3.63
3.37
WHIPlower is better
Jack Dreyer
.9101.37
now 1.01
1.25
Michael Petersen
.9101.37
now 1.12
1.27

Volume · rest of season
Strikeoutshigher is better
Jack Dreyer
4033.60
now 24
0
Michael Petersen
4033.60
now 23
0
Winshigher is better
Jack Dreyer
.0002.80
now 2
0–0
Michael Petersen
.0002.80
now 1
0–0

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

If you already own them — trade angle
Sell HighJack Dreyer — sell high. His value is peaking; good time to trade him.conf 0.79
BuyMichael Petersen — buy.conf 0.82
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