MLB Daily DeltaWeek 25 · September 10, 2026
Portrait of Jack Perkins
Jack Perkins
ATH · P
Change to
Portrait of Tyron Guerrero
Tyron Guerrero
BOS · P
Change to
Who's more valuable, rest of season

Tyron Guerrero.

He projects to help you in more roto categories the rest of the way — ERA and WHIP. Jack Perkins’s box score looks better right now, but it’s built on luck that won’t hold.

Head-to-head
K
ERA
WHIP
W
SV

Tyron Guerrero wins 2 categories (ERA, WHIP); Jack Perkins wins 1 (SV); 2 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Jack Perkins
95.7
Tyron Guerrero
100.2
Swinging-Strike %lg 11.0% · higher = better
Jack Perkins
12.8%
Tyron Guerrero
13.3%
Strikeout %lg 22.0% · higher = better
Jack Perkins
25.2%
Tyron Guerrero
22.6%
Chase %lg 28.5% · higher = better
Jack Perkins
33.5%
Tyron Guerrero
35.1%
Hard-Hit % Allowedlg 40.0% · lower = better
Jack Perkins
37.3%
Tyron Guerrero
33.3%
Barrel % Allowedlg 8.0% · lower = better
Jack Perkins
8.8%
Tyron Guerrero
3.5%
xwOBA Allowedlg .315 · lower = better
Jack Perkins
.311
Tyron Guerrero
.260
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
Jack Perkins
2.487.97
lg xERA 4.10
now 5.46
3.93
Tyron Guerrero
2.487.97
lg xERA 4.10
now 6.75
3.70
WHIPlower is better
Jack Perkins
1.091.62
now 1.21
1.35
Tyron Guerrero
1.091.62
now 1.50
1.24

Volume · rest of season
Strikeoutshigher is better
Jack Perkins
4043.40
now 33
7
Tyron Guerrero
4043.40
now 9
7
Winshigher is better
Jack Perkins
.0002.80
now 2
01
Tyron Guerrero
.0002.80
now 0
00
Saveshigher is better
Jack Perkins
.0004.40
now 3
01
Tyron Guerrero
.0004.40
now 0
0
If you already own them — trade angle
Buy LowJack Perkins — buy low. The dip is a window to acquire.conf 0.90
Buy LowTyron Guerrero — buy low. The dip is a window to acquire.conf 0.74
Tweet