MLB Daily DeltaWeek 25 · September 10, 2026
Geoff Hartlieb
ATH · P
Change to
Trevor Williams
TEX · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 00, 4 even. Take whoever fills a bigger need.

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

Geoff Hartlieb wins 0 (none); Trevor Williams wins 0 (none); 4 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Geoff Hartlieb
95.3
Trevor Williams
89.9
Swinging-Strike %lg 11.0% · higher = better
Geoff Hartlieb
11.7%
Trevor Williams
12.2%
Strikeout %lg 22.0% · higher = better
Geoff Hartlieb
13.6%
Trevor Williams
27.5%
Chase %lg 28.5% · higher = better
Geoff Hartlieb
30.5%
Trevor Williams
32.2%
Hard-Hit % Allowedlg 40.0% · lower = better
Geoff Hartlieb
41.5%
Trevor Williams
37.5%
Barrel % Allowedlg 8.0% · lower = better
Geoff Hartlieb
6.2%
Trevor Williams
7.1%
xwOBA Allowedlg .315 · lower = better
Geoff Hartlieb
.308
Trevor Williams
.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
Geoff Hartlieb
25.18
lg xERA 4.10
now 3.00
3.70
Trevor Williams
25.18
lg xERA 4.10
now 0.00
3.70
WHIPlower is better
Geoff Hartlieb
.9001.86
now 1.33
1.24
Trevor Williams
.9001.86
now 0.00
1.24

Volume · rest of season
Strikeoutshigher is better
Geoff Hartlieb
408.60
now 1
3
Trevor Williams
408.60
now 1
3
Winshigher is better
Geoff Hartlieb
.000.480
now 0
00
Trevor Williams
.000.480
now 0
00

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

If you already own them — trade angle
Buy LowGeoff Hartlieb — buy low. The dip is a window to acquire.conf 0.78
Hold · wait & seeTrevor Williams — hold.conf 0.50
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