Professional Fighters League brings unique format, big prizes to Mandalay Bay Case Keefer, Las Vegas Sun · October 10, 2019 at 12:47 pm Chris Curtis relocated to Las Vegas in January and immediately began training more intensely than he had at any other point in his 10-year professional mixed martial arts career. Twice a week, the 32-year-old Cincinnati native engages in double sparring sessions, scheduling a practice fight in the late morning/early afternoon before taking a couple of hours off and doing it all over again. “A lot of people are like, ‘Oh, you’re doing too much,’ ” Curtis says. Overtraining is a common problem among fighters, but Curtis has grown accustomed to explaining why he doesn’t believe he’s falling into that trap. There’s a purpose for preparing this way—it’s simulating what he’ll need to do October 11 at Mandalay Bay Events Center in the welterweight tournament of the 2019 Professional Fighters League playoffs.