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Justin Montalvo
8-3
#10 Welterweight
John O'Brien
5-2

Fight: Montalvo vs. O'Brien

27 JUL SUN '25 12:00 AM
main event 3 rounds

Main Info

nickname

Kid Marvelous

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Forms

L L W L W
W W L W W

Nationality

USA USA

USA USA

Age

(1996-04-21) 29

26 (1999-02-03)

Weight

(77 kg) 170 lbs

170 lbs (77 kg)

Height

(183 cm) 6′0″

5′11″ (180 cm)

Reach

(187 cm) 6′2″

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Social Media

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Win-Loss Records

Wins

8

4 KO/TKO - 36%
1 submission - 9%
3 decision - 27%

5

29% - 2 KO/TKO
14% - 1 submission
29% - 2 decision

Losses

3

1 KO/TKO - 9%
0 submission - 0%
2 decision - 18%

2

0% - 0 KO/TKO
14% - 1 submission
14% - 1 decision

Past Opponents

Show Cancelled Fights

Frequently Asked Questions About Montalvo vs. O'Brien

  • Which event are Justin Montalvo and John O'Brien fighting in?

    They are set to face each other in FAC 30: O'Brien vs. Montalvo.

  • How many rounds is the Justin Montalvo vs. John O'Brien?

    The bout is scheduled for a standard 3-round FAC fight.

  • Which organization is hosting the Justin Montalvo vs. John O'Brien?

    The fight is organized by the Fighting Alliance Championship (FAC).

  • When is the Justin Montalvo vs. John O'Brien fight?

    The fight is scheduled to take place on July 27, 2025

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