MLB Daily DeltaWeek 19 · August 4, 2026
Portrait of Ryan Zeferjahn
Ryan Zeferjahn
CHC · P
Change to
Portrait of Tim Mayza
Tim Mayza
PHI · 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 saves.

Head-to-head
K
ERA
WHIP
W
SV

Ryan Zeferjahn wins 3 categories (K, ERA, SV); Tim Mayza wins 1 (WHIP); 1 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Ryan Zeferjahn
97.4
Tim Mayza
94.7
Swinging-Strike %lg 11.0% · higher = better
Ryan Zeferjahn
13.8%
Tim Mayza
10.8%
Strikeout %lg 22.0% · higher = better
Ryan Zeferjahn
33.6%
Tim Mayza
24.9%
Chase %lg 28.5% · higher = better
Ryan Zeferjahn
24.3%
Tim Mayza
27.8%
Hard-Hit % Allowedlg 40.0% · lower = better
Ryan Zeferjahn
35.2%
Tim Mayza
45.4%
Barrel % Allowedlg 8.0% · lower = better
Ryan Zeferjahn
5.6%
Tim Mayza
7.1%
xwOBA Allowedlg .315 · lower = better
Ryan Zeferjahn
.268
Tim Mayza
.284
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
Ryan Zeferjahn
26.86
lg xERA 4.10
now 5.74
2.95
Tim Mayza
26.86
lg xERA 4.10
now 3.62
3.33
WHIPlower is better
Ryan Zeferjahn
.9001.55
now 1.39
1.32
Tim Mayza
.9001.55
now 0.99
1.20

Volume · rest of season
Strikeoutshigher is better
Ryan Zeferjahn
4038.40
now 32
19
Tim Mayza
4038.40
now 26
16
Winshigher is better
Ryan Zeferjahn
.0002.80
now 2
12
Tim Mayza
.0002.80
now 1
01
Saveshigher is better
Ryan Zeferjahn
.0002.40
now 1
01
Tim Mayza
.0002.40
now 0
0
If you already own them — trade angle
BuyRyan Zeferjahn — buy.conf 0.92
BuyTim Mayza — buy.conf 0.83
Tweet