Pereira won his second UFC championship in just his seventh fight for the promotion. Pereira, who won the middleweight championship last November at MSG, badly hurt Procházka and the fight was stopped at 4:08 of the second round. Procházka had won 13 straight MMA fights, including his first three in UFC.
Pereira became the ninth fighter in UFC history to win championships in two weight classes.
Pereira scored a superb second-round knockout win over Jiri Prochazka to claim the light heavyweight crown at UFC 295 at Madison Square Garden, 364 days after winning the middleweight title at the same venue.
The 36-year-old kickboxer landed a short left hook late in the second frame to stun his Czech opponent and followed it up with a flurry of fists and elbows that further impaired Prochazka, forcing referee Marc Goddard to stop the fight.
Brazil's Pereira, who knocked out Israel Adesanya on November 12 last year to win the middleweight belt before losing it in April in a rematch, had some early success with some vicious leg kicks, but Prochazka's precise striking posed a problem.
UFC now holds the top-three spots for highest gate at the Garden. Also, Sunday marks 30 years since the company's debut show, UFC 1.
Q1. What is the age of Alex Pereira?
A1. Alex Pereira is 36-year-old.
Q2. What record does Alex Pereira hold?
A2. Alex Pereira scored a superb second-round knockout win over Jiri Prochazka to claim the light heavyweight crown at UFC 295 at Madison Square Garden, 364 days after winning the middleweight title at the same venue.