MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Cal Quantrill
Cal Quantrill
TEX · 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

Cal Quantrill 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
Cal Quantrill
93.8
Michael Petersen
98.0
Swinging-Strike %lg 11.0% · higher = better
Cal Quantrill
9.4%
Michael Petersen
15.4%
Strikeout %lg 22.0% · higher = better
Cal Quantrill
18.3%
Michael Petersen
30.7%
Chase %lg 28.5% · higher = better
Cal Quantrill
30.1%
Michael Petersen
33.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Cal Quantrill
36.4%
Michael Petersen
42.4%
Barrel % Allowedlg 8.0% · lower = better
Cal Quantrill
7.3%
Michael Petersen
11.9%
xwOBA Allowedlg .315 · lower = better
Cal Quantrill
.303
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
Cal Quantrill
2.024.31
lg xERA 4.10
now 2.53
3.80
Michael Petersen
2.024.31
lg xERA 4.10
now 3.63
3.37
WHIPlower is better
Cal Quantrill
1.051.34
now 1.22
1.20
Michael Petersen
1.051.34
now 1.12
1.27

Volume · rest of season
Strikeoutshigher is better
Cal Quantrill
4032.20
now 14
0
Michael Petersen
4032.20
now 23
0
Winshigher is better
Cal Quantrill
.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 HighCal Quantrill — sell high. His value is peaking; good time to trade him.conf 0.95
BuyMichael Petersen — buy.conf 0.82
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