MLB Daily DeltaWeek 18 · July 28, 2026
PJ Poulin
WSH · P
Change to
Portrait of Ryan Zeferjahn
Ryan Zeferjahn
LAA · 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

PJ Poulin wins 2 (WHIP, W); Ryan Zeferjahn wins 2 (K, ERA); 1 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
PJ Poulin
90.1
Ryan Zeferjahn
97.4
Swinging-Strike %lg 11.0% · higher = better
PJ Poulin
6.8%
Ryan Zeferjahn
13.8%
Strikeout %lg 22.0% · higher = better
PJ Poulin
16.3%
Ryan Zeferjahn
32.7%
Chase %lg 28.5% · higher = better
PJ Poulin
23.7%
Ryan Zeferjahn
23.7%
Hard-Hit % Allowedlg 40.0% · lower = better
PJ Poulin
44.3%
Ryan Zeferjahn
35.3%
Barrel % Allowedlg 8.0% · lower = better
PJ Poulin
9.4%
Ryan Zeferjahn
5.9%
xwOBA Allowedlg .315 · lower = better
PJ Poulin
.353
Ryan Zeferjahn
.272
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
PJ Poulin
26.82
lg xERA 4.10
now 3.20
3.78
Ryan Zeferjahn
26.82
lg xERA 4.10
now 5.74
3.04
WHIPlower is better
PJ Poulin
1.181.54
now 1.46
1.26
Ryan Zeferjahn
1.181.54
now 1.39
1.35

Volume · rest of season
Strikeoutshigher is better
PJ Poulin
4038.80
now 18
15
Ryan Zeferjahn
4038.80
now 32
21
Winshigher is better
PJ Poulin
.2003.80
now 3
13
Ryan Zeferjahn
.2003.80
now 2
12
Saveshigher is better
PJ Poulin
.0003.40
now 2
12
Ryan Zeferjahn
.0003.40
now 1
01
If you already own them — trade angle
Sell HighPJ Poulin — sell high. His value is peaking; good time to trade him.conf 0.95
BuyRyan Zeferjahn — buy.conf 0.92
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