After taking a hard kick to the living during the first round of his comeback fight against former Strikeforce heavyweight champion Allistar Overeem, Brock Lesnar, the highest-paid fighter in the UFC, announced his retirement.

After the taking the brutal kick, Lesnar dropped to the ground and turtled, covering his head while Overeem delivered a flurry of punches to the head until the ref stopped the fight at the 2:26 mark of round one.

This was Lesnar’s first time back in the Octagon after enduring a second bout of diverticulitis, a lower-intestinal disease that nearly killed him. Apparently, one gets it from eating too much red meat, which, if you take one look at Lesnar, seems like a staple part of his diet.

After the fight, a devastated-looking Lesnar told Joe Rogan this was his last time in the Octagon.

“I’ve had a really difficult couple of years with my disease, and I’m going to officially say tonight is the last time,” Lesnar said. He added that he had promised his wife that if he lost this fight, he would throw in the towel on his MMA career.

Meanwhile, UFC president Dana White said he had no idea Lesnar was considering retirement, saying, “I had no idea he was going to do that. Am I surprised? No. Brock has may a lot of money in his career.”

As for Overeem, he is slated to fight for the UFC heavyweight champion against current holder, Junior Dos Santos. You can bet on MMA with Bovada now!