MLB Daily DeltaWeek 17 · July 20, 2026
Portrait of Riley O'Brien
Riley O'Brien
STL · P
Change to
Portrait of Seranthony Domínguez
Seranthony Domínguez
CWS · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 22, 1 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV

Riley O'Brien wins 2 (WHIP, SV); Seranthony Domínguez wins 2 (K, W); 1 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Riley O'Brien
98.2
Seranthony Domínguez
97.2
Swinging-Strike %lg 11.0% · higher = better
Riley O'Brien
12.1%
Seranthony Domínguez
13.0%
Strikeout %lg 22.0% · higher = better
Riley O'Brien
23.7%
Seranthony Domínguez
28.0%
Chase %lg 28.5% · higher = better
Riley O'Brien
29.3%
Seranthony Domínguez
26.8%
Hard-Hit % Allowedlg 40.0% · lower = better
Riley O'Brien
38.9%
Seranthony Domínguez
39.5%
Barrel % Allowedlg 8.0% · lower = better
Riley O'Brien
6.5%
Seranthony Domínguez
8.6%
xwOBA Allowedlg .315 · lower = better
Riley O'Brien
.323
Seranthony Domínguez
.348
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
Riley O'Brien
2.894.28
lg xERA 4.10
now 3.20
3.73
Seranthony Domínguez
2.894.28
lg xERA 4.10
now 3.97
3.74
WHIPlower is better
Riley O'Brien
.9001.35
now 0.99
1.24
Seranthony Domínguez
.9001.35
now 1.15
1.25

Volume · rest of season
Strikeoutshigher is better
Riley O'Brien
4033.60
now 27
22
Seranthony Domínguez
4033.60
now 28
25
Winshigher is better
Riley O'Brien
1.204.80
now 3
23
Seranthony Domínguez
1.204.80
now 3
24
Saveshigher is better
Riley O'Brien
3.8018.20
now 14
815
Seranthony Domínguez
3.8018.20
now 11
713
If you already own them — trade angle
Hold · wait & seeRiley O'Brien — hold.conf 0.50
Sell HighSeranthony Domínguez — sell high. His value is peaking; good time to trade him.conf 0.89
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