After competing in many Brazilian promotions, Freire compiled a 7-1 record before entering the Bellator Season Four Lightweight Tournament. He faced former WEC Lightweight Champion, Rob McCullough at Bellator 36 on March 12, 2011 in the opening round of the tournament. He won via TKO in the third round. Freire went on to face two-time finalist Toby Imada in the semifinal at Bellator 39. Freire defeated Imada via knockout in the first round after landing a brutal flying knee and following up with a flurry of punches which caused Imada to fall to the mat unconscious. The win saw him progress to the final of the tournament where he faced fellow finalist Michael Chandler at Bellator 44. Freire lost via unanimous decision. Freire next faced Kurt Pellegrino at Bellator 59 on November 26, 2011. He won the fight via TKO in the first round. Freire faced Eddie Alvarez at Bellator 76. After a back-and-forth opening minute that saw both fighters rocked, he lost the fight via knockout in the first round. It was announced that Freire will face Guillaume De Lorenzi in the Bellator 2013 Lightweight Tournament on January 31. Unfortunately, Freire suffered an injury and pulled out of the Lightweight Tournament a few days prior to this fight. Freire returned to the Bellator cage on September 7, 2013 as he faced Derek Anderson at. Despite winning the first round, Freire lost the fight via unanimous decision. In March 2014, Freire entered into the, where he faced David Rickels in the opening round at Bellator 113. He won the fight via knockout in the second round. In the semifinals, he faced Derek Campos at Bellator 117. Again he won the fight via TKO in the second round. He was scheduled to face Marcin Held in the finals at Bellator 120. However, Held was forced out of the bout due to injury, and the fight was subsequently cancelled. The bout eventually took place at Bellator 126 on September 26, 2014. Freire lost the fight via unanimous decision. After nearly a year away from the sport, Freire returned to face Saad Awad at Bellator 141 on August 28, 2015. He won the fight by unanimous decision. In the first rematch of his career, Freire faced Derek Anderson for a second time on December 4, 2015 at Bellator 147. He again lost the fight, this time by controversial split decision. Freire replaced an injured Derek Anderson to face Ryan Couture at on January 29, 2016. He won the bout via knockout in the first round. It was announced that Freire will face Derek Campos for the second time as the main event. Just four days before their scheduled bout Campos pulled out due to injury and replaced by the newly signed former UFC fighter Kevin Souza. In May 2016, Bellator President Scott Coker announced that Freire would have a rematch against Michael Chandler at Bellator 157 on June 17, 2016. The bout was for the vacant Bellator Lightweight Championship, which was vacated when champion Will Brooks was released from the promotion. Freire lost the fight via knockout in the first round. Freire returned to the Bellator cage on February 18, 2017 in the main event at Bellator 172 against Josh Thomson. He won the fight via knockout in the second round. Freire was expected to face Derek Campos for a second time at Bellator 167 on December 3, 2016, however Freire was forced out of the bout due to an injury. The rematch was scheduled to take place at Bellator 181 on July 14, 2017. However, Freire instead faced Benson Henderson at Bellator 183 on September 23, 2017. He won the fight by split decision. Freire is facing a 180-day medical suspension, unless he gets physician clearance regarding right rib pain. Freire faced Derek Campos in a rematch at Bellator 194 on February 16, 2018. He won the fight via TKO in round one. Freire faced Roger Huerta on September 21, 2018 at Bellator 205. He won the fight via knockout. Bellator booked Freire against newcomer Ryan Scope for their first show in the Bellator Europe series that marked the start of the organization's partnership with Channel 5 and Sky Sports. The event was called Bellator Newcastle and took place on February 11th. Despite rupturing a tendon in his right wrist on the first round of the fight, Freire won by split decision. On February 20, 2019, Bellator announced that Freire had signed a multi-year, multi-fight contract extension with the organization.
Due to his brother being the prevailing Bellator Lightweight champion, Patricky decided to take part in Rizin FF Lightweight tournament. In the first round of the tournament, Freire faced Tatsuya Kawajiri at Rizin 19 on October 12, 2019. He won the fight via knockout in the first round. In the semifinals of the grand prix Freire faced Luiz Gustavo at Rizin 20 - Saitama on December 31, 2019. Freire won the fight via a first minute knockout and advanced to the grand prix final. The 2019 Rizin Lightweight Grand Prix final was held in the same event with the semifinals. Despite Musayev receiving a yellow card in the second card, Freire lost the fight via unanimous decision after being knocked down and largely dominated in every round. Freire is next expected to headline Bellator Dublin 2 against Peter Queally on October 3, 2020.
Championships and awards
Bellator MMA
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*Most Knockout wins in Bellator history
MMAJunkie
*January 2016 Knockout of the Month vs. Ryan Couture on January 29
