MLB Daily DeltaWeek 27 · September 30, 2026
Portrait of Jake Bird
Jake Bird
WSH · 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

Jake Bird 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
Jake Bird
93.4
Michael Petersen
98.0
Swinging-Strike %lg 11.0% · higher = better
Jake Bird
11.2%
Michael Petersen
15.3%
Strikeout %lg 22.0% · higher = better
Jake Bird
23.8%
Michael Petersen
30.1%
Chase %lg 28.5% · higher = better
Jake Bird
23.9%
Michael Petersen
33.8%
Hard-Hit % Allowedlg 40.0% · lower = better
Jake Bird
36.3%
Michael Petersen
43.2%
Barrel % Allowedlg 8.0% · lower = better
Jake Bird
8.8%
Michael Petersen
12.3%
xwOBA Allowedlg .315 · lower = better
Jake Bird
.318
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
Jake Bird
2.835.62
lg xERA 4.10
now 5.00
3.70
Michael Petersen
2.835.62
lg xERA 4.10
now 3.63
3.45
WHIPlower is better
Jake Bird
1.041.41
now 1.33
1.24
Michael Petersen
1.041.41
now 1.12
1.28

Volume · rest of season
Strikeoutshigher is better
Jake Bird
4032.20
now 20
0
Michael Petersen
4032.20
now 23
0
Winshigher is better
Jake Bird
.0001.48
now 1
0–0
Michael Petersen
.0001.48
now 1
0–0

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

If you already own them — trade angle
Buy LowJake Bird — buy low. The dip is a window to acquire.conf 0.90
Sell HighMichael Petersen — sell high. His value is peaking; good time to trade him.conf 0.82
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