MLB Daily DeltaWeek 17 · July 21, 2026
Portrait of Juan Mejia
Juan Mejia
COL · P
Change to
Portrait of Tony Santillan
Tony Santillan
CIN · P
Change to
Who's more valuable, rest of season

Too close to call.

They split your categories 11, 3 even. Take whoever fills a bigger need.

Head-to-head
K
ERA
WHIP
W
SV

Juan Mejia wins 1 (K); Tony Santillan wins 1 (WHIP); 3 even.

04

Under the hood

Underlying skill — each value vs league avg
Fastball Velolg 94.0 · higher = better
Juan Mejia
97.4
Tony Santillan
94.6
Swinging-Strike %lg 11.0% · higher = better
Juan Mejia
13.0%
Tony Santillan
10.3%
Strikeout %lg 22.0% · higher = better
Juan Mejia
22.6%
Tony Santillan
20.9%
Chase %lg 28.5% · higher = better
Juan Mejia
32.0%
Tony Santillan
28.5%
Hard-Hit % Allowedlg 40.0% · lower = better
Juan Mejia
39.7%
Tony Santillan
46.7%
Barrel % Allowedlg 8.0% · lower = better
Juan Mejia
4.0%
Tony Santillan
10.9%
xwOBA Allowedlg .315 · lower = better
Juan Mejia
.317
Tony Santillan
.348
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
2.826.91
lg xERA 4.10
now 6.00
3.73
Tony Santillan
2.826.91
lg xERA 4.10
now 5.56
3.74
WHIPlower is better
Juan Mejia
1.061.88
now 1.70
1.26
Tony Santillan
1.061.88
now 1.50
1.24

Volume · rest of season
Strikeoutshigher is better
Juan Mejia
4035.60
now 30
26
Tony Santillan
4035.60
now 22
23
Winshigher is better
Juan Mejia
.5201.48
now 1
11
Tony Santillan
.5201.48
now 1
11
Saveshigher is better
Juan Mejia
.0004.40
now 3
23
Tony Santillan
.0004.40
now 2
12
If you already own them — trade angle
Buy LowJuan Mejia — buy low. The dip is a window to acquire.conf 0.90
Hold · wait & seeTony Santillan — hold.conf 0.50
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