LOS ANGELES -- USC sophomore George Farmer was back at wide receiver and performing well for most of the Trojans first two practices of the spring.
However, at the end of Thursday's practice Farmer left Howard Jones Field with an injured hamstring.
Farmer, who was a top five national recruit coming out of Serra High School in 2010, was moved from wide receiver to running back last season.
In his return to wide receiver this spring, he's made an impact, while flashing signs of what many expected out of him coming out of high school.
It's unknown how much time he'll have to miss with the injury.
"I don't know how bad it is," Kiffin said. "Hopefully he'll be right back but it's unfortunate because he was having two really good days.
With Farmer's injury, that leaves two-thirds of the Serra wide receiver alums on the shelf. Junior, Robert Woods is still recovering from ankle surgery in December.
Marqise Lee is healthy and dazzled with more leaping catches that are beginning to b...