MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Jack Flaherty
Jack Flaherty
DET · P
Change to
Portrait of Walker Buehler
Walker Buehler
SD · 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

Jack Flaherty wins 1 (WHIP); Walker Buehler 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
Jack Flaherty
92.7
Walker Buehler
94.0
Swinging-Strike %lg 11.0% · higher = better
Jack Flaherty
12.2%
Walker Buehler
8.8%
Strikeout %lg 22.0% · higher = better
Jack Flaherty
26.2%
Walker Buehler
20.2%
Chase %lg 28.5% · higher = better
Jack Flaherty
27.6%
Walker Buehler
27.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Flaherty
46.2%
Walker Buehler
38.7%
Barrel % Allowedlg 8.0% · lower = better
Jack Flaherty
8.4%
Walker Buehler
8.4%
xwOBA Allowedlg .315 · lower = better
Jack Flaherty
.323
Walker Buehler
.315
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
Jack Flaherty
3.516.47
lg xERA 4.10
now 5.81
4.32
Walker Buehler
3.516.47
lg xERA 4.10
now 4.88
4.17
WHIPlower is better
Jack Flaherty
1.201.73
now 1.61
1.36
Walker Buehler
1.201.73
now 1.32
1.37

Volume · rest of season
Strikeoutshigher is better
Jack Flaherty
4089.60
now 64
0
Walker Buehler
4089.60
now 43
0
Winshigher is better
Jack Flaherty
.0004.20
now 0
0–0
Walker Buehler
.0004.20
now 3
0–0

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

If you already own them — trade angle
SellJack Flaherty — sell.conf 0.65
Hold · steadyWalker Buehler — hold.conf 0.60
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