MLB Daily DeltaWeek 27 · September 29, 2026
Cionel Pérez
NYM · 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

Cionel Pérez 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
Cionel Pérez
96.7
Michael Petersen
98.0
Swinging-Strike %lg 11.0% · higher = better
Cionel Pérez
11.2%
Michael Petersen
15.3%
Strikeout %lg 22.0% · higher = better
Cionel Pérez
22.2%
Michael Petersen
30.1%
Chase %lg 28.5% · higher = better
Cionel Pérez
30.3%
Michael Petersen
33.8%
Hard-Hit % Allowedlg 40.0% · lower = better
Cionel Pérez
49.6%
Michael Petersen
43.2%
Barrel % Allowedlg 8.0% · lower = better
Cionel Pérez
11.9%
Michael Petersen
12.3%
xwOBA Allowedlg .315 · lower = better
Cionel Pérez
.346
Michael Petersen
.287
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
Cionel Pérez
2.506.77
lg xERA 4.10
now 5.82
3.70
Michael Petersen
2.506.77
lg xERA 4.10
now 3.63
3.45
WHIPlower is better
Cionel Pérez
.9301.78
now 1.59
1.24
Michael Petersen
.9301.78
now 1.12
1.28

Volume · rest of season
Strikeoutshigher is better
Cionel Pérez
4032.20
now 10
0
Michael Petersen
4032.20
now 23
0
Winshigher is better
Cionel Pérez
.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
Hold · wait & seeCionel Pérez — hold.conf 0.50
Sell HighMichael Petersen — sell high. His value is peaking; good time to trade him.conf 0.82
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