MLB Daily DeltaWeek 27 · September 28, 2026
Portrait of Jonathan Bowlan
Jonathan Bowlan
PHI · P
Change to
Portrait of Mason Montgomery
Mason Montgomery
PIT · 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

Jonathan Bowlan wins 1 (WHIP); Mason Montgomery wins 1 (ERA); 2 even; SV n/a.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Jonathan Bowlan
97.1
Mason Montgomery
98.5
Swinging-Strike %lg 11.0% · higher = better
Jonathan Bowlan
15.7%
Mason Montgomery
16.0%
Strikeout %lg 22.0% · higher = better
Jonathan Bowlan
31.9%
Mason Montgomery
37.5%
Chase %lg 28.5% · higher = better
Jonathan Bowlan
35.2%
Mason Montgomery
32.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Jonathan Bowlan
36.5%
Mason Montgomery
42.1%
Barrel % Allowedlg 8.0% · lower = better
Jonathan Bowlan
7.3%
Mason Montgomery
6.2%
xwOBA Allowedlg .315 · lower = better
Jonathan Bowlan
.262
Mason Montgomery
.249
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
Jonathan Bowlan
25.51
lg xERA 4.10
now 4.67
2.85
Mason Montgomery
25.51
lg xERA 4.10
now 3.91
2.58
WHIPlower is better
Jonathan Bowlan
1.031.33
now 1.15
1.10
Mason Montgomery
1.031.33
now 1.26
1.13

Volume · rest of season
Strikeoutshigher is better
Jonathan Bowlan
4042
now 16
0
Mason Montgomery
4042
now 30
0
Winshigher is better
Jonathan Bowlan
.0001.48
now 1
0–0
Mason Montgomery
.0001.48
now 1
0–0

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

If you already own them — trade angle
BuyJonathan Bowlan — buy.conf 0.92
BuyMason Montgomery — buy.conf 0.92
Tweet