MLB Daily DeltaWeek 18 · July 23, 2026
Portrait of Paul Blackburn
Paul Blackburn
NYY · P
Change to
Zack Kelly
BOS · 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

Paul Blackburn wins 2 (ERA, W); Zack Kelly wins 2 (K, WHIP); SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Paul Blackburn
94.6
Zack Kelly
96.1
Swinging-Strike %lg 11.0% · higher = better
Paul Blackburn
9.6%
Zack Kelly
9.2%
Strikeout %lg 22.0% · higher = better
Paul Blackburn
18.7%
Zack Kelly
19.7%
Chase %lg 28.5% · higher = better
Paul Blackburn
26.2%
Zack Kelly
28.0%
Hard-Hit % Allowedlg 40.0% · lower = better
Paul Blackburn
32.7%
Zack Kelly
38.8%
Barrel % Allowedlg 8.0% · lower = better
Paul Blackburn
6.8%
Zack Kelly
8.2%
xwOBA Allowedlg .315 · lower = better
Paul Blackburn
.295
Zack Kelly
.368
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
Paul Blackburn
3.093.92
lg xERA 4.10
now 3.33
3.62
Zack Kelly
3.093.92
lg xERA 4.10
now 3.31
3.70
WHIPlower is better
Paul Blackburn
1.161.52
now 1.44
1.33
Zack Kelly
1.161.52
now 1.29
1.24

Volume · rest of season
Strikeoutshigher is better
Paul Blackburn
4022.60
now 16
14
Zack Kelly
4022.60
now 14
17
Winshigher is better
Paul Blackburn
.0004.20
now 2
13
Zack Kelly
.0004.20
now 0
00

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

If you already own them — trade angle
Sell HighPaul Blackburn — sell high. His value is peaking; good time to trade him.conf 0.95
Hold · wait & seeZack Kelly — hold.conf 0.50
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