MLB Daily DeltaWeek 19 · July 30, 2026
Portrait of Mark Leiter Jr.
Mark Leiter Jr.
ATH · P
Change to
Portrait of Ryan Zeferjahn
Ryan Zeferjahn
LAA · P
Change to
Who's more valuable, rest of season

Ryan Zeferjahn.

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

Head-to-head
K
ERA
WHIP
W
SV

Ryan Zeferjahn wins 3 categories (K, ERA, W); Mark Leiter Jr. wins 2 (WHIP, SV).

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Mark Leiter Jr.
92.2
Ryan Zeferjahn
97.4
Swinging-Strike %lg 11.0% · higher = better
Mark Leiter Jr.
14.0%
Ryan Zeferjahn
13.8%
Strikeout %lg 22.0% · higher = better
Mark Leiter Jr.
26.4%
Ryan Zeferjahn
32.9%
Chase %lg 28.5% · higher = better
Mark Leiter Jr.
33.8%
Ryan Zeferjahn
23.5%
Hard-Hit % Allowedlg 40.0% · lower = better
Mark Leiter Jr.
31.9%
Ryan Zeferjahn
36.2%
Barrel % Allowedlg 8.0% · lower = better
Mark Leiter Jr.
3.3%
Ryan Zeferjahn
5.7%
xwOBA Allowedlg .315 · lower = better
Mark Leiter Jr.
.316
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
Mark Leiter Jr.
2.066.79
lg xERA 4.10
now 5.47
3.72
Ryan Zeferjahn
2.066.79
lg xERA 4.10
now 5.74
3.11
WHIPlower is better
Mark Leiter Jr.
1.151.55
now 1.46
1.24
Ryan Zeferjahn
1.151.55
now 1.39
1.34

Volume · rest of season
Strikeoutshigher is better
Mark Leiter Jr.
4038
now 25
17
Ryan Zeferjahn
4038
now 32
21
Winshigher is better
Mark Leiter Jr.
.0002.80
now 0
00
Ryan Zeferjahn
.0002.80
now 2
12
Saveshigher is better
Mark Leiter Jr.
.0005.60
now 4
24
Ryan Zeferjahn
.0005.60
now 1
01
If you already own them — trade angle
Hold · wait & seeMark Leiter Jr. — hold.conf 0.50
BuyRyan Zeferjahn — buy.conf 0.90
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