Examining the San Francisco 49ers' roster:QUARTERBACKS (2)Colin KaepernickBlaine GabbertBecause of heavy competition elsewhere, the 49ers likely will only carry two quarterbacks. They finished last season that way.RUNNING BACKS (5)Frank GoreCarlos HydeMarcus LattimoreBruce MillerLaMichael JamesThe fact that the 49ers drafted Hyde in the second round and Lattimore is healthy means some tough decisions will have to be made.