MLB Daily DeltaWeek 19 · July 30, 2026
Portrait of Jack Flaherty
Jack Flaherty
DET · P
Change to
Portrait of Luis Severino
Luis Severino
ATH · 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

Jack Flaherty wins 2 (K, WHIP); Luis Severino wins 2 (ERA, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Jack Flaherty
92.7
Luis Severino
96.9
Swinging-Strike %lg 11.0% · higher = better
Jack Flaherty
12.2%
Luis Severino
10.9%
Strikeout %lg 22.0% · higher = better
Jack Flaherty
26.2%
Luis Severino
24.0%
Chase %lg 28.5% · higher = better
Jack Flaherty
27.6%
Luis Severino
31.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Flaherty
46.2%
Luis Severino
38.7%
Barrel % Allowedlg 8.0% · lower = better
Jack Flaherty
8.4%
Luis Severino
8.7%
xwOBA Allowedlg .315 · lower = better
Jack Flaherty
.323
Luis Severino
.318
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
3.506.47
lg xERA 4.10
now 5.81
4.31
Luis Severino
3.506.47
lg xERA 4.10
now 4.16
4.21
WHIPlower is better
Jack Flaherty
1.261.71
now 1.61
1.36
Luis Severino
1.261.71
now 1.47
1.41

Volume · rest of season
Strikeoutshigher is better
Jack Flaherty
41.2071.80
now 64
53
Luis Severino
41.2071.80
now 65
48
Winshigher is better
Jack Flaherty
.0002.80
now 0
00
Luis Severino
.0002.80
now 2
12

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

If you already own them — trade angle
SellJack Flaherty — sell.conf 0.65
Hold · leans sellLuis Severino — hold.conf 0.60
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