MLB Daily DeltaWeek 25 · September 10, 2026
Kenley Jansen
DET · P
Change to
Portrait of Mason Montgomery
Mason Montgomery
PIT · P
Change to
Who's more valuable, rest of season

Mason Montgomery.

He projects to help you in more roto categories the rest of the way — ERA and WHIP.

Head-to-head
K
ERA
WHIP
W
SV

Mason Montgomery wins 2 categories (ERA, WHIP); Kenley Jansen wins 1 (SV); 2 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Kenley Jansen
93.9
Mason Montgomery
98.4
Swinging-Strike %lg 11.0% · higher = better
Kenley Jansen
12.8%
Mason Montgomery
16.3%
Strikeout %lg 22.0% · higher = better
Kenley Jansen
27.0%
Mason Montgomery
37.9%
Chase %lg 28.5% · higher = better
Kenley Jansen
30.1%
Mason Montgomery
32.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Kenley Jansen
36.1%
Mason Montgomery
40.9%
Barrel % Allowedlg 8.0% · lower = better
Kenley Jansen
9.3%
Mason Montgomery
7.1%
xwOBA Allowedlg .315 · lower = better
Kenley Jansen
.298
Mason Montgomery
.250
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
Kenley Jansen
25.69
lg xERA 4.10
now 4.80
3.70
Mason Montgomery
25.69
lg xERA 4.10
now 3.91
2.57
WHIPlower is better
Kenley Jansen
1.061.33
now 1.20
1.24
Mason Montgomery
1.061.33
now 1.26
1.13

Volume · rest of season
Strikeoutshigher is better
Kenley Jansen
4039.60
now 19
6
Mason Montgomery
4039.60
now 30
6
Winshigher is better
Kenley Jansen
.0001.48
now 1
00
Mason Montgomery
.0001.48
now 1
00
Saveshigher is better
Kenley Jansen
.0009.80
now 7
13
Mason Montgomery
.0009.80
now 0
0
If you already own them — trade angle
Hold · wait & seeKenley Jansen — hold.conf 0.50
BuyMason Montgomery — buy.conf 0.92
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