MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of George Soriano
George Soriano
STL · 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

George Soriano 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
George Soriano
96.6
Riley O'Brien
97.7
Swinging-Strike %lg 11.0% · higher = better
George Soriano
13.9%
Riley O'Brien
11.9%
Strikeout %lg 22.0% · higher = better
George Soriano
22.8%
Riley O'Brien
23.2%
Chase %lg 28.5% · higher = better
George Soriano
33.4%
Riley O'Brien
29.2%
Hard-Hit % Allowedlg 40.0% · lower = better
George Soriano
39.5%
Riley O'Brien
42.2%
Barrel % Allowedlg 8.0% · lower = better
George Soriano
9.1%
Riley O'Brien
7.5%
xwOBA Allowedlg .315 · lower = better
George Soriano
.327
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
George Soriano
2.445.13
lg xERA 4.10
now 3.04
4.27
Riley O'Brien
2.445.13
lg xERA 4.10
now 3.20
4.53
WHIPlower is better
George Soriano
.9001.56
now 1.14
1.40
Riley O'Brien
.9001.56
now 0.99
1.36

Volume · rest of season
Strikeoutshigher is better
George Soriano
4037.80
now 20
0
Riley O'Brien
4037.80
now 27
0
Winshigher is better
George Soriano
.0004.20
now 2
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
SellGeorge Soriano — sell.conf 0.69
SellRiley O'Brien — sell.conf 0.81
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