MONTREAL -- Former UFC welterweight champion Georges St-Pierre welcomes the decision by the Nevada Athletic Commission to ban mixed martial arts fighters from using testosterone replacement therapy. He says so-called TRT is only one problem and he wants to go even further than the ban. "Its about time," St-Pierre told reporters at a promotional event in Montreal on Friday. "I think its a good thing." The commission voted unanimously in Las Vegas on Thursday to quit granting therapeutic use exemptions for fighters undergoing TRT. "Its not the UFC (thats) the problem," said St-Pierre. "I believe its the sport, the system." St-Pierre added he thought the ban is a move in the right direction. "I believe theres a lot more things to do. I believe they need to allow testing too -- testing by an organization that doesnt have any interest in the money surrounding the fight." St-Pierre said the decision by Nevada state regulators is "great for a lot of guys -- good, honest guys will be happy." The decision by the commission that regulates boxing and mixed martial arts in Nevada came several weeks after the Association of Ringside Physicians labelled so-called "unmerited testosterone" a health risk for athletes who practise combat sports. UFC president Dana White said he also supported the Nevada ruling and encouraged all athletic commissions to adopt the ban. "We believe our athletes should compete based on their natural abilities and on an even playing field," he said in a statement. White also said the UFC would honour the ruling in international markets, "where due to a lack of governing bodies, the UFC oversees regulatory efforts for our live events." Several UFC fighters have been granted exemptions in recent years to use testosterone before their bouts, ostensibly for medical reasons. The decision is already having effects on UFC. Vitor Belfort, who used TRT, dropped out of his upcoming middleweight title shot against Chris Weidman. As for his own future in the UFC, St-Pierre wasnt telling reporters much, except to say that hes in the best condition hes ever been in his life. The 32-year-old suffers from obsessive compulsive disorder and did not sleep much for about a decade. "Whats changed is that Im sleeping better," he said. "Before I slept around five hours a night because of stress, but now Im around seven hours and thats made a big difference in my life." St-Pierre said hes living a more healthy lifestyle, the stress is gone and hes happier. He took a break from UFC last December for personal reasons and still hasnt decided whether he will return to the octagon. "I dont know if Im going to stop," St-Pierre said. "I dont know what Im going to do. I need a bit of time to decide what Im going to do." But he hasnt completely ruled out a career in the movies, after getting a small part as the villain Batroc the Leaper in the upcoming "Captain America: The Winter Soldier." "I dont know if Im ready to do that full-time," he said. "I dont know if Im a good actor." St-Pierre said he may have to come on as a bad guy in the ring, but thats whats necessary in his sport. "I dont believe in bad persons," he said. "I believe people are shaped by their genetic environment. "Some people say they look at a serial killer and say hes a bad person. Hes not a worse person than you are because he had been shaped by his genetic and social environment and that makes him what he is -- thats what I believe." The former champ may have hinted at his future Friday as he spent almost an hour coaching a group of 18 enthusiastic amateurs in the finer arts of ultimate fighting. The group included a number of winners of a cross-Canada contest by Bacardi Canada, one of St-Pierres main sponsors. Colorado Rockies Gear . 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"We used to be much better than that.Tennessee Titans quarterback Zach Mettenberger injured his right shoulder in the third quarter against the Houston Texans on Sunday.The rookie quarterback left the game when driven to the ground by J.J. Watt. On the series prior to the injury, Mettenberger threw a 36-yard touchdown pass to Kendall Wright. Jake Locker replaced him and threw an interception on his first play.Titans cornerback Johnathan Joseph injured his Achilles tendon in the third quarter and didnt return, but said after the game that he was OK. The Titans said wide receiver Justin Hunter has a lacerated spleen and will spend the night in a Houston hospital.Giants right tackle Geoff Schwartz, playing in place of starter Justin Pugh, injured his left ankle and left on a cart against Jacksonville. His replacement, James Brewer, also left with a concussion. Running back Rashad Jennings went down with an ankle injury.Coach Tom Coughlin said X-rays were negative on Schwartzs ankle, but he does have tendon damage. Giants linebacker Terrell Manning (ankle) and defensive end Robert Ayers (pectoral) also left the game. Jaguars defensive end Andre Branch reinjured a groin muscle that kept him out the previous four games.Cleveland Browns receiver Miles Austin will remain in a Buffalo hospital overnight after sustaining a kidney injury during a 26-10 loss to the Bills.The Browns issued the update four hours after the game Sunday. Its unclear when Austin was hurt in a game he had seven catches for a team-leading 86 yards.Browns tight end Gary Barnidge did not return after hurting his ribs in the first quuarter.dddddddddddd Center Nick McDonald did not return after hurting his ankle in the first quarter.Packers cornerback Sam Shields left the game against New England because of a concussion. He got hurt early in the second quarter on a play in which Patriots running back Brandon Bolden gained 12 yards.Shields, who was not in on the tackle, stayed down for a few moments on one knee before getting up briefly. Shields went down again before the next play, then jogged off the field accompanied by trainers.Arizona safety Tyrann Mathieu left the Cardinals loss at the Falcons with a broken thumb. Running back Andre Ellington left after aggravating a hip injury.Rams guard Rodger Saffold aggravated a nagging left shoulder injury in the second half and did not return, but expects to play next week at Washington. Raiders tight end Brian Leonhardt (concussion) was hurt on a kickoff return in the first quarter and did not return. Offensive lineman Menelik Watson (ankle) was sidelined in the second quarter.In other injury news:—Steelers defensive end Brett Keisel left in the third quarter of the loss to the Saints with a triceps problem.—Colts cornerback Vontae Davis left in the third quarter of their victory over the Redskins with a concussion.—Baltimore wide receiver Marlon Brown landed hard on his back after making a first-down catch in the first quarter and left with a concussion against San Diego. Chargers centre Chris Watt took a hit on his calf in the third quarter and did not return.___AP NFL website: www.pro32.ap.org and http://twitter.com/AP_NFL ' ' '