MLB Daily DeltaWeek 27 · September 27, 2026
Portrait of Kyle Leahy
Kyle Leahy
STL · P
Change to
Portrait of Ryne Nelson
Ryne Nelson
AZ · 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

Kyle Leahy wins 1 (ERA); Ryne Nelson 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
Kyle Leahy
94.3
Ryne Nelson
96.4
Swinging-Strike %lg 11.0% · higher = better
Kyle Leahy
10.5%
Ryne Nelson
11.4%
Strikeout %lg 22.0% · higher = better
Kyle Leahy
22.1%
Ryne Nelson
17.4%
Chase %lg 28.5% · higher = better
Kyle Leahy
27.2%
Ryne Nelson
33.5%
Hard-Hit % Allowedlg 40.0% · lower = better
Kyle Leahy
47.0%
Ryne Nelson
43.8%
Barrel % Allowedlg 8.0% · lower = better
Kyle Leahy
9.8%
Ryne Nelson
10.2%
xwOBA Allowedlg .315 · lower = better
Kyle Leahy
.337
Ryne Nelson
.351
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
Kyle Leahy
3.985.19
lg xERA 4.10
now 4.25
4.61
Ryne Nelson
3.985.19
lg xERA 4.10
now 4.82
4.92
WHIPlower is better
Kyle Leahy
1.041.71
now 1.56
1.34
Ryne Nelson
1.041.71
now 1.19
1.29

Volume · rest of season
Strikeoutshigher is better
Kyle Leahy
4072.80
now 46
0
Ryne Nelson
4072.80
now 52
0
Winshigher is better
Kyle Leahy
.0007
now 5
0–0
Ryne Nelson
.0007
now 2
0–0

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

If you already own them — trade angle
SellKyle Leahy — sell.conf 0.78
Sell HighRyne Nelson — sell high. His value is peaking; good time to trade him.conf 0.88
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