MLB Daily DeltaWeek 20 · August 9, 2026
Portrait of Michael Petersen
Michael Petersen
MIA · P
Change to
Portrait of Pierce Johnson
Pierce Johnson
CIN · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 11, 3 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV

Michael Petersen wins 1 (ERA); Pierce Johnson wins 1 (K); 3 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Michael Petersen
97.9
Pierce Johnson
95.4
Swinging-Strike %lg 11.0% · higher = better
Michael Petersen
14.1%
Pierce Johnson
11.4%
Strikeout %lg 22.0% · higher = better
Michael Petersen
29.3%
Pierce Johnson
20.7%
Chase %lg 28.5% · higher = better
Michael Petersen
32.4%
Pierce Johnson
35.1%
Hard-Hit % Allowedlg 40.0% · lower = better
Michael Petersen
42.0%
Pierce Johnson
39.2%
Barrel % Allowedlg 8.0% · lower = better
Michael Petersen
10.7%
Pierce Johnson
11.8%
xwOBA Allowedlg .315 · lower = better
Michael Petersen
.285
Pierce Johnson
.366
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
3.053.96
lg xERA 4.10
now 3.63
3.69
Pierce Johnson
3.053.96
lg xERA 4.10
now 3.27
3.74
WHIPlower is better
Michael Petersen
1.051.31
now 1.12
1.24
Pierce Johnson
1.051.31
now 1.23
1.24

Volume · rest of season
Strikeoutshigher is better
Michael Petersen
4028.60
now 23
13
Pierce Johnson
4028.60
now 20
15
Winshigher is better
Michael Petersen
.0002.80
now 1
01
Pierce Johnson
.0002.80
now 2
12
Saveshigher is better
Michael Petersen
.0002.40
now 1
01
Pierce Johnson
.0002.40
now 1
01
If you already own them — trade angle
Hold · wait & seeMichael Petersen — hold.conf 0.50
Sell HighPierce Johnson — sell high. His value is peaking; good time to trade him.conf 0.95
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