MLB Daily DeltaWeek 20 · August 9, 2026
Portrait of Jack Leiter
Jack Leiter
TEX · P
Change to
Portrait of Tyler Mahle
Tyler Mahle
ATL · 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 Leiter wins 2 (K, W); Tyler Mahle wins 2 (ERA, WHIP); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Jack Leiter
96.7
Tyler Mahle
92.7
Swinging-Strike %lg 11.0% · higher = better
Jack Leiter
12.2%
Tyler Mahle
9.9%
Strikeout %lg 22.0% · higher = better
Jack Leiter
23.4%
Tyler Mahle
23.0%
Chase %lg 28.5% · higher = better
Jack Leiter
30.4%
Tyler Mahle
27.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Leiter
39.9%
Tyler Mahle
36.8%
Barrel % Allowedlg 8.0% · lower = better
Jack Leiter
10.3%
Tyler Mahle
6.9%
xwOBA Allowedlg .315 · lower = better
Jack Leiter
.336
Tyler Mahle
.309
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 Leiter
3.166.86
lg xERA 4.10
now 4.34
4.55
Tyler Mahle
3.166.86
lg xERA 4.10
now 6.04
3.98
WHIPlower is better
Jack Leiter
1.251.62
now 1.33
1.37
Tyler Mahle
1.251.62
now 1.54
1.36

Volume · rest of season
Strikeoutshigher is better
Jack Leiter
4088.40
now 74
43
Tyler Mahle
4088.40
now 57
38
Winshigher is better
Jack Leiter
.0004.20
now 3
12
Tyler Mahle
.0004.20
now 1
01

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

If you already own them — trade angle
SellJack Leiter — sell.conf 0.76
Hold · steadyTyler Mahle — hold.conf 0.60
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