The Baltimore Anthem, one of two expansion teams in the second season of the National Pro Grid League, signed its first player last week, world champion and Olympic silver medalist weightlifter Dmitry Klokov of Russia, then added Mat Fraser,thesecond-place finisher at the 2014 CrossFit Games, on Thursday. The league bills itself as the world's first professional coed spectator sport. Competitions involve two teams racing head-to-head in tests of endurance that involve weightlifting and bodyweight elements. The Anthem and Carolina Crush will join the DC Brawlers, Boston Iron, New York Rhinos, Miami Surge, Phoenix Rise, Los Angeles Reign and San Francisco Fire for the 2015 season. NBC Sports Group will telecast at least five regular-season Grid League matches on NBC Sports Network, as well as all seven playoff matches this summer.