MLB Daily DeltaWeek 19 · July 31, 2026
Portrait of Mitchell Parker
Mitchell Parker
WSH · P
Change to
Portrait of Ryan Rolison
Ryan Rolison
CHC · P
Change to
Who's more valuable, rest of season

Ryan Rolison.

He projects to help you in more roto categories the rest of the way — ERA, WHIP, and wins. Mitchell Parker’s box score looks better right now, but the luck-stripped projection flips it.

Head-to-head
K
ERA
WHIP
W
SV

Ryan Rolison wins 3 categories (ERA, WHIP, W); Mitchell Parker wins 2 (K, SV).

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Mitchell Parker
93.6
Ryan Rolison
94.6
Swinging-Strike %lg 11.0% · higher = better
Mitchell Parker
14.1%
Ryan Rolison
9.8%
Strikeout %lg 22.0% · higher = better
Mitchell Parker
19.1%
Ryan Rolison
25.6%
Chase %lg 28.5% · higher = better
Mitchell Parker
32.0%
Ryan Rolison
25.5%
Hard-Hit % Allowedlg 40.0% · lower = better
Mitchell Parker
41.9%
Ryan Rolison
42.6%
Barrel % Allowedlg 8.0% · lower = better
Mitchell Parker
8.5%
Ryan Rolison
5.8%
xwOBA Allowedlg .315 · lower = better
Mitchell Parker
.347
Ryan Rolison
.311
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
Mitchell Parker
26.24
lg xERA 4.10
now 5.28
3.82
Ryan Rolison
26.24
lg xERA 4.10
now 2.89
3.70
WHIPlower is better
Mitchell Parker
1.081.48
now 1.17
1.25
Ryan Rolison
1.081.48
now 1.39
1.24

Volume · rest of season
Strikeoutshigher is better
Mitchell Parker
4031.60
now 26
20
Ryan Rolison
4031.60
now 16
12
Winshigher is better
Mitchell Parker
.0005.20
now 2
12
Ryan Rolison
.0005.20
now 3
24
Saveshigher is better
Mitchell Parker
.0002.40
now 1
11
Ryan Rolison
.0002.40
now 0
0
If you already own them — trade angle
Hold · wait & seeMitchell Parker — hold.conf 0.55
Hold · wait & seeRyan Rolison — hold.conf 0.50
Tweet