Michael Johnson has spent nearly 40 percent of his life as a UFC fighter in a career with the promotion that’s about to hit 15 years.

Veteran lightweight mainstay, Michael Johnson rolled back the clock tonight against Morrocan opponent, Ottman Azaitar during their expected fire-fight at UFC

At UFC on ESPN 63 in Tampa, Fla., Johnson (23-19 MMA, 15-15 UFC) knocked Ottman Azaitar (13-3 MMA, 2-3 UFC) unconscious in brutal fashion with a blistering overhand right.

Michael Johnson still has more than enough firepower to make noise in the Ultimate Fighting Championship lightweight division.

Check out these photos highlighting Michael Johnson's knockout win over Ottman Azaitar at UFC on ESPN 63 from Amalie Arena in Tampa, Fla. (Photos by Nathan Ray Seebeck, Imagn Images)

This bout is a preliminary card (fight 7 of 13) in the UFC Fight Night to be held in Tampa, Florida. Johnson comes to this bout with a record of 22-19-0, while Azaitar comes with a record of 13-2-0. This makes the fight difficult and complicated to predict;

Michael Johnson isn't stopping anytime soon. In a career that features wins over the likes of Tony Ferguson, Edson Barboza and Dustin Poirier, the 38-year-old J

Michael Johnson can stick around as long as he wants if he keeps delivering knockouts like this. In his 30th UFC appearance, Johnson might have scored the most memorable finish of his octagon career as he absolutely leveled Ottman Azaitar with a right hand knockout punch at UFC Tampa on Saturday.