Early career Palelei made his professional MMA debut in September 2002. He was undefeated for the first two years of his career, going 7–0 with all wins either by
TKO or submission. He suffered his first defeat via submission to
Choi Mu-Bae at
PRIDE 28 in October 2004.
Ultimate Fighting Championship Palelei had a brief stint in the UFC at
UFC 79 against
Eddie Sanchez, losing by TKO in the third round. He was released from the promotion shortly after.
Post-UFC He was at one stage linked a fight at
ONE FC – Pride of a Nation against former
UFC Heavyweight Champion Andrei Arlovski, however ONE FC officials pulled him from the fight as he refused to sign a five-fight exclusive contract with
ONE Fighting Championship. He was replaced by former
UFC Heavyweight Champion Tim Sylvia. After his release from the UFC in 2007, Palelei went 10–1 including wins over UFC veterans
Brad Morris and
Sean McCorkle. He defeated McCorkle in the main event at
Australian Fighting Championship (AFC) 4 via technical knock-out in round one and defended his AFC heavyweight title he won at AFC 3.
Return to UFC In March 2013, Palelei signed a multi fight deal with the UFC. Palelei was expected to face
Stipe Miocic on 15 June 2013 at
UFC 161 until Miocic was reassigned to fight
Roy Nelson as a replacement on the main card and Palelei was pulled from the event. Palelei faced UFC newcomer
Nikita Krylov at
UFC 164. He won the fight via third-round TKO in a lackluster fight which saw both fighters exhausted after the first round. It was later revealed that Palelei suffered a fractured rib during the week before the fight. Palelei next faced
Pat Barry at
UFC Fight Night 33 on 7 December 2013. He won the fight via knockout in the first round, after achieving full mount position and landing a barrage of punches. Palelei faced promotional newcomer
Ruan Potts on 10 May 2014 at
UFC Fight Night 40. He won the fight via knockout, again from a full mount, in the first round. Palelei faced
Jared Rosholt on 28 June 2014 at
UFC Fight Night 43. Palelei lost the fight via unanimous decision. Palelei was expected to face
Daniel Omielańczuk on 8 November 2014 at
UFC Fight Night 55. However, Omielańczuk was forced to pull out of bout with a broken thumb and was replaced by
Walt Harris. He won the fight by TKO in the second round. Palelei faced
Antônio Silva on 1 August 2015 at
UFC 190. He lost the fight by TKO in the second round. In turn, Palelei announced his retirement from MMA on 19 October 2015. ==Accomplishments==