...  Pac 12 Football USC: Trying to crack USC’s receiving core is difficult. Espcially if you cannot practice with the team in the spring. George Farmer is in a precarious position. The sophomore desperately wants to practice so he can build off his strong spring start and prove he deserves to be USC’s No. 3 wide receiver. But he also doesn’t want to come back too soon from the hamstring strain that has kept him out of action since March 8. “I want to get back this week, but I’m not sure about that,” Farmer said. “It depends on how I feel and when I can run 100 percent.” Considering his own estimate that the hamstring is only 60 percent ...