Cops are investigating their deaths as a possible murder/suicide, according to TMZ.com.
Levens, 28, was shot in the head, while his wife, 25, had a gunshot wound in her heart.
Levens (9-8) had a promising career early on, winning his first seven fights and landing himself in the UFC, but he was never able to string together more than two wins from that point on. Levens's career ends on a five-fight losing streak and eight losses out of his last ten fights.
Levens was scheduled to fight in July at Affliction "Banned" but the fight was cancelled due to time constraints after the show began later than scheduled. Even though Levens didn't compete, he was drug tested and ended up testing positive for the painkiller Oxymorphone. Levens was fined $1,000 and suspended until Jan. 15, 2009.
In May 2007, also in Laguna Niguel, Levens' close friend and teammate Jeremy Williams died of a self-inflicted gunshot wound.
AP Video: MMA fighter, wife found dead