MLB Daily DeltaWeek 27 · September 27, 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 1–1, 2 even. Take whoever fills a bigger need.

Head-to-head
K
◀
ERA
WHIP
▶
W
SV n/a

Kumar Rocker wins 1 (ERA); Steven Matz wins 1 (WHIP); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Kumar Rocker
94.5
Steven Matz
93.6
Swinging-Strike %lg 11.0% · higher = better
Kumar Rocker
12.5%
Steven Matz
9.9%
Strikeout %lg 22.0% · higher = better
Kumar Rocker
21.4%
Steven Matz
17.7%
Chase %lg 28.5% · higher = better
Kumar Rocker
31.4%
Steven Matz
29.2%
Hard-Hit % Allowedlg 40.0% · lower = better
Kumar Rocker
40.0%
Steven Matz
35.3%
Barrel % Allowedlg 8.0% · lower = better
Kumar Rocker
7.5%
Steven Matz
10.7%
xwOBA Allowedlg .315 · lower = better
Kumar Rocker
.324
Steven Matz
.343
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
3.065.22
lg xERA 4.10
now 3.54
4.34
Steven Matz
3.065.22
lg xERA 4.10
now 4.67
4.74
WHIPlower is better
Kumar Rocker
1.171.45
now 1.32
1.38
Steven Matz
1.171.45
now 1.24
1.32

Volume · rest of season
Strikeoutshigher is better
Kumar Rocker
4061.60
now 44
0
Steven Matz
4061.60
now 35
0
Winshigher is better
Kumar Rocker
.0005.60
now 2
0–0
Steven Matz
.0005.60
now 4
0–0

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

If you already own them — trade angle
SellKumar Rocker — sell.conf 0.66
SellSteven Matz — sell.conf 0.84
Tweet