MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Mitch Farris
Mitch Farris
LAA · P
Change to
Portrait of Riley O'Brien
Riley O'Brien
STL · 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

Mitch Farris wins 1 (ERA); Riley O'Brien wins 1 (WHIP); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Mitch Farris
91.7
Riley O'Brien
97.7
Swinging-Strike %lg 11.0% · higher = better
Mitch Farris
12.5%
Riley O'Brien
11.9%
Strikeout %lg 22.0% · higher = better
Mitch Farris
24.3%
Riley O'Brien
23.2%
Chase %lg 28.5% · higher = better
Mitch Farris
29.2%
Riley O'Brien
29.2%
Hard-Hit % Allowedlg 40.0% · lower = better
Mitch Farris
46.7%
Riley O'Brien
42.2%
Barrel % Allowedlg 8.0% · lower = better
Mitch Farris
8.9%
Riley O'Brien
7.5%
xwOBA Allowedlg .315 · lower = better
Mitch Farris
.335
Riley O'Brien
.340
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
Mitch Farris
2.445.13
lg xERA 4.10
now 3.04
4.43
Riley O'Brien
2.445.13
lg xERA 4.10
now 3.20
4.53
WHIPlower is better
Mitch Farris
.9001.73
now 1.52
1.38
Riley O'Brien
.9001.73
now 0.99
1.36

Volume · rest of season
Strikeoutshigher is better
Mitch Farris
4037.80
now 22
0
Riley O'Brien
4037.80
now 27
0
Winshigher is better
Mitch Farris
.0004.20
now 0
0–0
Riley O'Brien
.0004.20
now 3
0–0

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

If you already own them — trade angle
SellMitch Farris — sell.conf 0.77
SellRiley O'Brien — sell.conf 0.81
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