MLB Daily DeltaWeek 17 · July 19, 2026
Portrait of Paul Sewald
Paul Sewald
AZ · 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 22, 1 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV

Paul Sewald wins 2 (ERA, SV); Riley O'Brien wins 2 (K, W); 1 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Paul Sewald
91.4
Riley O'Brien
98.2
Swinging-Strike %lg 11.0% · higher = better
Paul Sewald
14.6%
Riley O'Brien
12.1%
Strikeout %lg 22.0% · higher = better
Paul Sewald
27.7%
Riley O'Brien
23.7%
Chase %lg 28.5% · higher = better
Paul Sewald
30.6%
Riley O'Brien
29.3%
Hard-Hit % Allowedlg 40.0% · lower = better
Paul Sewald
41.6%
Riley O'Brien
38.9%
Barrel % Allowedlg 8.0% · lower = better
Paul Sewald
12.4%
Riley O'Brien
6.5%
xwOBA Allowedlg .315 · lower = better
Paul Sewald
.283
Riley O'Brien
.323
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
Paul Sewald
2.983.95
lg xERA 4.10
now 3.63
3.69
Riley O'Brien
2.983.95
lg xERA 4.10
now 3.20
3.73
WHIPlower is better
Paul Sewald
.9001.45
now 0.72
1.24
Riley O'Brien
.9001.45
now 0.99
1.24

Volume · rest of season
Strikeoutshigher is better
Paul Sewald
4032.60
now 24
22
Riley O'Brien
4032.60
now 27
23
Winshigher is better
Paul Sewald
.0005.20
now 1
11
Riley O'Brien
.0005.20
now 3
24
Saveshigher is better
Paul Sewald
422
now 15
918
Riley O'Brien
422
now 14
815
If you already own them — trade angle
Hold · wait & seePaul Sewald — hold.conf 0.50
Hold · wait & seeRiley O'Brien — hold.conf 0.50
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