MLB Daily DeltaWeek 19 · July 31, 2026
Portrait of Kumar Rocker
Kumar Rocker
TEX · P
Change to
Portrait of Steven Matz
Steven Matz
TB · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 22. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV n/a

Kumar Rocker wins 2 (ERA, WHIP); Steven Matz wins 2 (K, W); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Kumar Rocker
94.4
Steven Matz
93.3
Swinging-Strike %lg 11.0% · higher = better
Kumar Rocker
12.4%
Steven Matz
10.1%
Strikeout %lg 22.0% · higher = better
Kumar Rocker
21.3%
Steven Matz
17.4%
Chase %lg 28.5% · higher = better
Kumar Rocker
31.7%
Steven Matz
27.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Kumar Rocker
42.1%
Steven Matz
36.2%
Barrel % Allowedlg 8.0% · lower = better
Kumar Rocker
7.3%
Steven Matz
12.6%
xwOBA Allowedlg .315 · lower = better
Kumar Rocker
.329
Steven Matz
.361
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
Kumar Rocker
2.905.77
lg xERA 4.10
now 3.54
4.42
Steven Matz
2.905.77
lg xERA 4.10
now 4.67
5.13
WHIPlower is better
Kumar Rocker
1.171.44
now 1.32
1.34
Steven Matz
1.171.44
now 1.24
1.37

Volume · rest of season
Strikeoutshigher is better
Kumar Rocker
4049.60
now 44
34
Steven Matz
4049.60
now 35
37
Winshigher is better
Kumar Rocker
.0006.60
now 2
12
Steven Matz
.0006.60
now 4
25

SV — not applicable. Both pitch out of the rotation.

If you already own them — trade angle
SellKumar Rocker — sell.conf 0.70
SellSteven Matz — sell.conf 0.90
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