After more than a decade in the ring, light heavyweight Mike Kyle has apparently opted to walk away from MMA and move on to the next phase of his life. The 32-year old’s decision to do so was prompted by his opening round submission loss to Gegard Mousasi last night at Strikeforce: Marquardt vs. Saffiedine.

Though not officially announced, UFC reporter Ariel Helwani sent out a Tweet saying Kyle had told him, “It’s not in me anymore. That was my last one.”

The stumble marked Kyle’s second first-frame stoppage in his last two fights, though a 33-second knockout loss to Rafael Cavalcante last May was ruled a No Contest after “Feijao” tested positive for PED use.

Kyle exits the sport with an overall record of 19-9-2. Fifteen of his wins involved some form of finish including twelve TKOs and three submissions.