MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
Portrait of Jameson Taillon
Jameson Taillon
TOR · 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

David Peterson wins 1 (ERA); Jameson Taillon wins 1 (WHIP); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
David Peterson
92.5
Jameson Taillon
91.8
Swinging-Strike %lg 11.0% · higher = better
David Peterson
10.5%
Jameson Taillon
12.3%
Strikeout %lg 22.0% · higher = better
David Peterson
20.7%
Jameson Taillon
20.5%
Chase %lg 28.5% · higher = better
David Peterson
28.8%
Jameson Taillon
30.1%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
39.6%
Jameson Taillon
39.6%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.3%
Jameson Taillon
14.6%
xwOBA Allowedlg .315 · lower = better
David Peterson
.333
Jameson Taillon
.367
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
David Peterson
4.195.71
lg xERA 4.10
now 5.18
4.53
Jameson Taillon
4.195.71
lg xERA 4.10
now 5.37
5.30
WHIPlower is better
David Peterson
1.161.71
now 1.59
1.44
Jameson Taillon
1.161.71
now 1.28
1.32

Volume · rest of season
Strikeoutshigher is better
David Peterson
4078.40
now 56
0
Jameson Taillon
4078.40
now 51
0
Winshigher is better
David Peterson
.0004.20
now 3
0–0
Jameson Taillon
.0004.20
now 2
0–0

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

If you already own them — trade angle
SellDavid Peterson — sell.conf 0.75
SellJameson Taillon — sell.conf 0.90
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