MLB Daily DeltaWeek 18 · July 23, 2026
Portrait of Kevin Kelly
Kevin Kelly
TB · 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

Kevin Kelly wins 2 (WHIP, SV); 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
Kevin Kelly
93.0
Ryan Zeferjahn
97.4
Swinging-Strike %lg 11.0% · higher = better
Kevin Kelly
8.6%
Ryan Zeferjahn
13.8%
Strikeout %lg 22.0% · higher = better
Kevin Kelly
19.4%
Ryan Zeferjahn
32.5%
Chase %lg 28.5% · higher = better
Kevin Kelly
32.2%
Ryan Zeferjahn
23.1%
Hard-Hit % Allowedlg 40.0% · lower = better
Kevin Kelly
46.2%
Ryan Zeferjahn
34.7%
Barrel % Allowedlg 8.0% · lower = better
Kevin Kelly
6.9%
Ryan Zeferjahn
6.1%
xwOBA Allowedlg .315 · lower = better
Kevin Kelly
.318
Ryan Zeferjahn
.274
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
Kevin Kelly
26.97
lg xERA 4.10
now 2.67
3.74
Ryan Zeferjahn
26.97
lg xERA 4.10
now 5.74
3.10
WHIPlower is better
Kevin Kelly
.9001.62
now 0.81
1.24
Ryan Zeferjahn
.9001.62
now 1.39
1.35

Volume · rest of season
Strikeoutshigher is better
Kevin Kelly
4038.80
now 19
15
Ryan Zeferjahn
4038.80
now 32
24
Winshigher is better
Kevin Kelly
.2003.80
now 3
13
Ryan Zeferjahn
.2003.80
now 2
12
Saveshigher is better
Kevin Kelly
.0004.40
now 2
13
Ryan Zeferjahn
.0004.40
now 1
01
If you already own them — trade angle
Sell HighKevin Kelly — sell high. His value is peaking; good time to trade him.conf 0.95
BuyRyan Zeferjahn — buy.conf 0.90
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