MLB Daily DeltaWeek 18 · July 23, 2026
Chris Roycroft
TB · P
Change to
Isaac Mattson
PIT · P
Change to
Who's more valuable, rest of season

Isaac Mattson.

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

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

Isaac Mattson wins 1 categories (K); Chris Roycroft wins 0 (none); 3 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Chris Roycroft
94.2
Isaac Mattson
94.1
Swinging-Strike %lg 11.0% · higher = better
Chris Roycroft
8.2%
Isaac Mattson
10.7%
Strikeout %lg 22.0% · higher = better
Chris Roycroft
16.3%
Isaac Mattson
20.6%
Chase %lg 28.5% · higher = better
Chris Roycroft
26.9%
Isaac Mattson
26.7%
Hard-Hit % Allowedlg 40.0% · lower = better
Chris Roycroft
43.6%
Isaac Mattson
46.4%
Barrel % Allowedlg 8.0% · lower = better
Chris Roycroft
14.5%
Isaac Mattson
12.4%
xwOBA Allowedlg .315 · lower = better
Chris Roycroft
.393
Isaac Mattson
.362
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
Chris Roycroft
28.25
lg xERA 4.10
now 12.27
3.70
Isaac Mattson
28.25
lg xERA 4.10
now 4.12
3.70
WHIPlower is better
Chris Roycroft
.9002.55
now 3.55
1.24
Isaac Mattson
.9002.55
now 1.47
1.24

Volume · rest of season
Strikeoutshigher is better
Chris Roycroft
4020.60
now 3
13
Isaac Mattson
4020.60
now 15
14
Winshigher is better
Chris Roycroft
.000.480
now 0
00
Isaac Mattson
.000.480
now 0
00

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

If you already own them — trade angle
Hold · wait & seeChris Roycroft — hold.conf 0.55
Hold · wait & seeIsaac Mattson — hold.conf 0.50
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