Jason Guida

Mixed martial arts career

Guida appeared on The Ultimate Fighter: Team Nogueira vs. Team Mir and was eliminated in the first episode for failing to make the 206 lb weight limit by one pound.

Following this, as a last minute replacement for Ken Shamrock, Guida faced former WWE pro wrestling star Bobby Lashley. Guida lost via unanimous decision. Before his bout with Lashley, he and Guida got in a scuffle at a pre-fight press conference that had to be broken up by Roy Jones Jr..

Guida then suffered losses to UFC veteran Jeremy Horn and top Chechen contender Mamed Khalidov, but overcame his losing streak with a knockout win over former UFC fighter Logan Clark, ending the fight with a barrage of punches in the first round in Clark's hometown of Rochester, Minnesota.

In 2009 Jason was set to take on 2011 ADCC World Championship Nottingham Gold Medalist and current UFC fighter, Vinny Magalhães in the main event of "Carolina Crown 2" as a late replacement for Lance Evans, the brother of UFC star Rashad Evans. He later dropped out of the fight due to a lower back injury sustained during training, he was replaced by Bellator fighter Chris Davis.

In 2010, Guida then tried out for The Ultimate Fighter 12 in the Light Heavyweight division but was unsuccessful when the Light Heavyweights were cut before the season started in favor of a Lightweight only season.

Guida stepped in as a replacement and fought Justin Lemke at Bellator 29 in a 210 lb catchweight bout and his Bellator debut. Guida weighed in 5 lbs over the catchweight limit and the fight was changed to a 215 lb catchweight bout.

Guida was involved in a backstage scuffle with former UFC veteran Sean McCorkle at UFC 123 in which members of Guida's camp and Guida himself warned McCorkle that Jason was a made man.

In 2011, Jason joined his brother Clay and started training under top mixed martial arts trainer, Greg Jackson, in an attempt to reinvent his fighting career.

On November 16, 2012 Guida was scheduled to make his return against former UFC veteran Jason Brilz in the main event of Disorderly Conduct 13. The fight was later scrapped due to an injury Jason suffered training with Greg Jackson's MMA.

Guida fought Anthony Gomez at Bellator 112 on March 14, 2014, after his original opponent Sean Salmon pulled out for undisclosed reasons. He lost via unanimous decision.

In 2016, Guida yet again was involved in a backstage scuffle, this time with UFC veteran Nate Diaz at UFC 199 after his brother Clay lost his fight against Brian Ortega via knockout, Jason became visibly upset after the end of Clay's fight before approaching Diaz backstage as he was preparing to enter a Q&A interview about his main event fight with Conor McGregor before Jason suddenly bull rushed Nate and pressed him up against a wall before Justin Buchholz and UFC staff intervened and separated the two of them.