MLB Daily DeltaWeek 25 · September 10, 2026
Portrait of Greg Weissert
Greg Weissert
BOS · 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 11, 2 even. Take whoever fills a bigger need.

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

Greg Weissert 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
Greg Weissert
94.1
Michael Petersen
97.9
Swinging-Strike %lg 11.0% · higher = better
Greg Weissert
11.8%
Michael Petersen
14.8%
Strikeout %lg 22.0% · higher = better
Greg Weissert
24.5%
Michael Petersen
28.6%
Chase %lg 28.5% · higher = better
Greg Weissert
32.8%
Michael Petersen
33.5%
Hard-Hit % Allowedlg 40.0% · lower = better
Greg Weissert
32.9%
Michael Petersen
41.3%
Barrel % Allowedlg 8.0% · lower = better
Greg Weissert
5.9%
Michael Petersen
10.1%
xwOBA Allowedlg .315 · lower = better
Greg Weissert
.294
Michael Petersen
.286
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
Greg Weissert
3.054.58
lg xERA 4.10
now 4.24
3.60
Michael Petersen
3.054.58
lg xERA 4.10
now 3.63
3.39
WHIPlower is better
Greg Weissert
11.53
now 1.41
1.27
Michael Petersen
11.53
now 1.12
1.30

Volume · rest of season
Strikeoutshigher is better
Greg Weissert
4030.60
now 22
4
Michael Petersen
4030.60
now 23
4
Winshigher is better
Greg Weissert
.0001.48
now 0
00
Michael Petersen
.0001.48
now 1
00

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

If you already own them — trade angle
BuyGreg Weissert — buy.conf 0.75
BuyMichael Petersen — buy.conf 0.81
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