Heavy-handed California heavyweight Alexander "The Great" Flores returned to the ring last Thursday night with a vengeance, knocking out Mario "Chabelo" Heredia in the sixth round of the RJJ Boxing on UFC FIGHT PASS main event, outdoors Casino Del Sol's AVA Amphitheater in Tucson, Arizona.

The 29-year-old Flores (18-2-1, 16 KOs) hadn't fought since last December in New Zealand, when he lost a controversial fight to former world champion Joseph Parker, in which Parker struck Flores numerous times below the belt, leading to a knockout.

Knockout-artist Flores floored his Mexican opponent, Heredia, three times during their fight in the third, fifth and the finisher in the sixth. Flores, who is a former World Boxing Council (WBC) World Youth champion, used a vicious body attack, resulting in the last two knockdowns, against the 282-pound Heredia (16-8-1, 13 KOs).

Flores' only two losses have been to world champions Parker and Charles Martin. Heredia, a former WBC FECOMBOX champion, who only three fights ago won a split decision over former WBC heavyweight world champion and Nigerian Olympian Samuel Peter.

In the co-featured event, red-hot Mexican welterweight Santiago Dominguez (20-0, 16 KOs) blasted Ravshan Hudayhazarov (17-3, 13 KOs), the Uzbekistan fighter, stopping him only 43-seconds into the opening round in a devastating performance.

In his RJJ Boxing Promotions debut, undefeated California super middleweight Juan "Just Business" Barajas (11-0, 7 KOs) pitched a complete shutout victory, winning each round on all three-judges' scorecards, in a unanimous decision over Phoenix veteran Fidel Hernandez (20-8-1, 11 KOs), who announced before the fight that this would be his last.

In the UFC FIGHT PASS opener, unbeaten Tucson welterweight Christopher Gonzalez (6-0-1, 1 KO) pulled off a mild upset, taking an eight-round unanimous decision from Marcos "Nazzy" Dominguez (11-2-1, 10 KOs), the younger brother of Santiago.

Local fan favorite Briana "Amenaza" Sanchez (2-0-1, 2 KOs) and pro-debuting junior flyweight Amanda Borg (0-0-1), of Albuquerque, battled to a four-round majority draw in the opening, off UFC FIGHT PASS fight of evening.