The former NFL and Maryland linebacker known as "Lights Out" will try to punch out an opponent's lights in a bare-knuckle boxing match. Shawne Merriman has agreed to compete with the World Bare Knuckle Fighting Federation on a pay-per-view event in Casper, Wyo., this fall, the promoters announced Wednesday. Merriman, 34, was a three-time Pro Bowl selection during his eight-year NFL career with the San Diego Chargers and Buffalo Bills . Merriman retired from the NFL in 2013, and he flirted with the idea of becoming a professional wrestler the next year.