MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Foster Griffin
Foster Griffin
CLE · 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 1–1, 2 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
▶
◀
WHIP
W
SV n/a

Foster Griffin wins 1 (WHIP); Tyler Mahle 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
Foster Griffin
91.5
Tyler Mahle
92.8
Swinging-Strike %lg 11.0% · higher = better
Foster Griffin
11.2%
Tyler Mahle
10.4%
Strikeout %lg 22.0% · higher = better
Foster Griffin
21.9%
Tyler Mahle
22.3%
Chase %lg 28.5% · higher = better
Foster Griffin
32.0%
Tyler Mahle
28.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Foster Griffin
37.0%
Tyler Mahle
37.1%
Barrel % Allowedlg 8.0% · lower = better
Foster Griffin
8.3%
Tyler Mahle
6.8%
xwOBA Allowedlg .315 · lower = better
Foster Griffin
.320
Tyler Mahle
.306
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
Foster Griffin
2.856.95
lg xERA 4.10
now 3.76
4.26
Tyler Mahle
2.856.95
lg xERA 4.10
now 6.04
3.95
WHIPlower is better
Foster Griffin
.9901.70
now 1.15
1.26
Tyler Mahle
.9901.70
now 1.54
1.30

Volume · rest of season
Strikeoutshigher is better
Foster Griffin
4091
now 65
0
Tyler Mahle
4091
now 57
0
Winshigher is better
Foster Griffin
.0008.40
now 6
0–0
Tyler Mahle
.0008.40
now 1
0–0

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

If you already own them — trade angle
Hold · leans sellFoster Griffin — hold.conf 0.60
Hold · steadyTyler Mahle — hold.conf 0.60
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