MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Craig Kimbrel
Craig Kimbrel
KC · P
Change to
Isaac Mattson
PIT · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 0–0, 4 even. Take whoever fills a bigger need.

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

Craig Kimbrel wins 0 (none); Isaac Mattson wins 0 (none); 4 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Craig Kimbrel
93.6
Isaac Mattson
94.2
Swinging-Strike %lg 11.0% · higher = better
Craig Kimbrel
11.1%
Isaac Mattson
10.4%
Strikeout %lg 22.0% · higher = better
Craig Kimbrel
20.4%
Isaac Mattson
20.5%
Chase %lg 28.5% · higher = better
Craig Kimbrel
28.7%
Isaac Mattson
27.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Craig Kimbrel
36.6%
Isaac Mattson
52.1%
Barrel % Allowedlg 8.0% · lower = better
Craig Kimbrel
5.3%
Isaac Mattson
12.4%
xwOBA Allowedlg .315 · lower = better
Craig Kimbrel
.316
Isaac Mattson
.374
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
Craig Kimbrel
2.936.40
lg xERA 4.10
now 5.63
3.70
Isaac Mattson
2.936.40
lg xERA 4.10
now 4.12
3.70
WHIPlower is better
Craig Kimbrel
1.151.56
now 1.44
1.24
Isaac Mattson
1.151.56
now 1.47
1.24

Volume · rest of season
Strikeoutshigher is better
Craig Kimbrel
4023.80
now 17
0
Isaac Mattson
4023.80
now 15
0
Winshigher is better
Craig Kimbrel
.000.480
now 0
0–0
Isaac Mattson
.000.480
now 0
0–0

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

If you already own them — trade angle
Hold · wait & seeCraig Kimbrel — hold.conf 0.50
Hold · wait & seeIsaac Mattson — hold.conf 0.50
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