Sechew “Iron Horse” Powell celebrated a family gathering on the fight card and continued his rise to prominence in the junior middleweight division with a convincing, 10-round unanimous decision over veteran Robert “Push Up” Frazier Friday on “ShoBox: The New Generation.” In the action-packed co-feature, Andre Berto kept his perfect record and his torrid knockout rate intact by stopping previously unbeaten Jonathan Tubbs with a third-round TKO in a welterweight clash. The doubleheader, staged at the Pend Oreille Pavillion at Northern Quest Casino in Airway Heights, Wash. before a sellout crowd of 806, was promoted by DiBella Entertainment and aired at 11 p.m. ET/PT (delayed on west coast). [details]