MLB Daily DeltaWeek 25 · September 10, 2026
Portrait of Juan Mejia
Juan Mejia
COL · P
Change to
Portrait of Wandy Peralta
Wandy Peralta
SD · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 22, 1 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV

Juan Mejia wins 2 (K, SV); Wandy Peralta wins 2 (ERA, WHIP); 1 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Juan Mejia
97.0
Wandy Peralta
96.3
Swinging-Strike %lg 11.0% · higher = better
Juan Mejia
11.5%
Wandy Peralta
11.3%
Strikeout %lg 22.0% · higher = better
Juan Mejia
19.9%
Wandy Peralta
15.4%
Chase %lg 28.5% · higher = better
Juan Mejia
30.4%
Wandy Peralta
33.4%
Hard-Hit % Allowedlg 40.0% · lower = better
Juan Mejia
37.9%
Wandy Peralta
33.8%
Barrel % Allowedlg 8.0% · lower = better
Juan Mejia
3.3%
Wandy Peralta
3.7%
xwOBA Allowedlg .315 · lower = better
Juan Mejia
.338
Wandy Peralta
.312
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
Juan Mejia
27.31
lg xERA 4.10
now 6.00
4.47
Wandy Peralta
27.31
lg xERA 4.10
now 2.73
3.95
WHIPlower is better
Juan Mejia
1.281.82
now 1.70
1.53
Wandy Peralta
1.281.82
now 1.44
1.40

Volume · rest of season
Strikeoutshigher is better
Juan Mejia
4040.40
now 30
6
Wandy Peralta
4040.40
now 19
4
Winshigher is better
Juan Mejia
.0001.48
now 1
00
Wandy Peralta
.0001.48
now 0
00
Saveshigher is better
Juan Mejia
.0004.40
now 3
01
Wandy Peralta
.0004.40
now 0
0
If you already own them — trade angle
Hold · leans sellJuan Mejia — hold.conf 0.60
Hold · steadyWandy Peralta — hold.conf 0.60
Tweet