MLB Daily DeltaWeek 25 · September 10, 2026
Portrait of David Peterson
David Peterson
CHC · P
Change to
George Klassen
LAA · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 22. Take whoever fills a bigger need.

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

David Peterson wins 2 (K, W); George Klassen wins 2 (ERA, WHIP); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
David Peterson
92.5
George Klassen
96.4
Swinging-Strike %lg 11.0% · higher = better
David Peterson
10.2%
George Klassen
14.3%
Strikeout %lg 22.0% · higher = better
David Peterson
19.5%
George Klassen
19.2%
Chase %lg 28.5% · higher = better
David Peterson
28.6%
George Klassen
25.4%
Hard-Hit % Allowedlg 40.0% · lower = better
David Peterson
40.6%
George Klassen
45.6%
Barrel % Allowedlg 8.0% · lower = better
David Peterson
6.2%
George Klassen
8.9%
xwOBA Allowedlg .315 · lower = better
David Peterson
.341
George Klassen
.358
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
2.838.25
lg xERA 4.10
now 5.18
4.67
George Klassen
2.838.25
lg xERA 4.10
now 7.27
4.10
WHIPlower is better
David Peterson
.9002.55
now 1.59
1.47
George Klassen
.9002.55
now 2.88
1.30

Volume · rest of season
Strikeoutshigher is better
David Peterson
4074.80
now 56
12
George Klassen
4074.80
now 9
9
Winshigher is better
David Peterson
.0004.20
now 3
01
George Klassen
.0004.20
now 0
00

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

If you already own them — trade angle
SellDavid Peterson — sell.conf 0.81
Sell HighGeorge Klassen — sell high. His value is peaking; good time to trade him.conf 0.95
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