MLB Daily DeltaWeek 18 · July 24, 2026
Portrait of Griffin Jax
Griffin Jax
TB · P
Change to
Portrait of Juan Mejia
Juan Mejia
COL · 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

Griffin Jax wins 2 (K, WHIP); Juan Mejia wins 2 (ERA, SV); 1 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Griffin Jax
96.2
Juan Mejia
97.4
Swinging-Strike %lg 11.0% · higher = better
Griffin Jax
14.7%
Juan Mejia
13.0%
Strikeout %lg 22.0% · higher = better
Griffin Jax
24.6%
Juan Mejia
22.9%
Chase %lg 28.5% · higher = better
Griffin Jax
34.6%
Juan Mejia
31.9%
Hard-Hit % Allowedlg 40.0% · lower = better
Griffin Jax
39.9%
Juan Mejia
40.0%
Barrel % Allowedlg 8.0% · lower = better
Griffin Jax
10.3%
Juan Mejia
3.8%
xwOBA Allowedlg .315 · lower = better
Griffin Jax
.343
Juan Mejia
.316
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
Griffin Jax
3.246.79
lg xERA 4.10
now 4.76
4.57
Juan Mejia
3.246.79
lg xERA 4.10
now 6.00
4.03
WHIPlower is better
Griffin Jax
1.101.87
now 1.47
1.27
Juan Mejia
1.101.87
now 1.70
1.41

Volume · rest of season
Strikeoutshigher is better
Griffin Jax
4037.60
now 32
25
Juan Mejia
4037.60
now 30
24
Winshigher is better
Griffin Jax
.0001.48
now 1
01
Juan Mejia
.0001.48
now 1
01
Saveshigher is better
Griffin Jax
.0004.40
now 0
0
Juan Mejia
.0004.40
now 3
23
If you already own them — trade angle
SellGriffin Jax — sell.conf 0.83
Buy LowJuan Mejia — buy low. The dip is a window to acquire.conf 0.90
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