The former UFC welterweight and middleweight champion has provided the promotion written notice that he is retired, MMA Fighting confirmed Tuesday with UFC vice president of athlete health and performance Jeff Novitzky. ESPN was the first to report the news.
That formal retirement is significant with regards to the UFC’s anti-doping policy. With his retirement, St-Pierre will remove himself from the USADA drug-testing pool. That means that if he were to return, GSP would have to spend at least six months back in the pool before competing again, per policy.
“He is out [of the pool],” Novitzky said.