MLB Daily DeltaWeek 20 · August 7, 2026
Portrait of Michael Petersen
Michael Petersen
MIA · P
Change to
Portrait of Ryan Rolison
Ryan Rolison
CHC · P
Change to
Who's more valuable, rest of season

Michael Petersen.

He projects to help you in more roto categories the rest of the way — strikeouts and saves.

Head-to-head
K
ERA
WHIP
W
SV

Michael Petersen wins 2 categories (K, SV); Ryan Rolison wins 1 (W); 2 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Michael Petersen
97.8
Ryan Rolison
94.6
Swinging-Strike %lg 11.0% · higher = better
Michael Petersen
14.0%
Ryan Rolison
9.9%
Strikeout %lg 22.0% · higher = better
Michael Petersen
29.2%
Ryan Rolison
25.7%
Chase %lg 28.5% · higher = better
Michael Petersen
32.8%
Ryan Rolison
25.8%
Hard-Hit % Allowedlg 40.0% · lower = better
Michael Petersen
42.7%
Ryan Rolison
42.3%
Barrel % Allowedlg 8.0% · lower = better
Michael Petersen
10.9%
Ryan Rolison
6.2%
xwOBA Allowedlg .315 · lower = better
Michael Petersen
.285
Ryan Rolison
.303
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
Michael Petersen
2.574.02
lg xERA 4.10
now 3.63
3.69
Ryan Rolison
2.574.02
lg xERA 4.10
now 2.89
3.70
WHIPlower is better
Michael Petersen
1.011.50
now 1.12
1.24
Ryan Rolison
1.011.50
now 1.39
1.24

Volume · rest of season
Strikeoutshigher is better
Michael Petersen
4028.60
now 23
13
Ryan Rolison
4028.60
now 16
10
Winshigher is better
Michael Petersen
.0005.60
now 1
01
Ryan Rolison
.0005.60
now 3
14
Saveshigher is better
Michael Petersen
.0002.40
now 1
01
Ryan Rolison
.0002.40
now 0
0
If you already own them — trade angle
Hold · wait & seeMichael Petersen — hold.conf 0.50
Hold · wait & seeRyan Rolison — hold.conf 0.50
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