CLEMSON -- Adding another tailback to the mix before fall camp may prove a wise move.
Ray Ray McElrathbey, Clemson's third-string back, injured a knee during Thursday's practice, the same knee that underwent minor surgery in late July.
Coach Tommy Bowden said the extent of the injury will not be known until after an MRI today, although McElrathbey said team doctors were hopeful the injury was a sprained tendon because he could put pressure on it.
"I should be OK," McElrathbey said.
McElrathbey said the injury occurred while making a cut during a team drill.
Before this month's practices, the Tigers shifted sophomore safety Sadat Chambers to tailback because of the lack of depth behind co-starters James Davis and C.J. Spiller. McElrathbey had been the only other recruited scholarship player in the backfield, although he began his career as a defensive back.
Bowden said if McElrathbey is forced to miss significant time, another unspecified player would get practice work at tailback.
• GOING SINGLE: Bowden called Texas coach Mack Brown and Virginia Tech's Frank Beamer to confer about their philosophies on two-a-day practices.
Virginia Tech has scrapped the concept altogether, while Texas has moved more of its practices into its indoor facility. So the three two-a-days Clemson has held might be the last.
The Tigers melded today's scheduled dual sessions, their last this camp, into one afternoon practice. And Bowden said he will consider eliminating the format next season.
So add indoor facility to his facilities wish list.
"It would be awfully helpful," Bowden said.
• EXTRA POINTS: Sophomore Crezdon Butler holds the lead for the boundary cornerback battle ahead of redshirt freshman Byron Maxwell, Bowden said. ... Defensive end Ricky Sapp (sprained ankle), tackles Dorell Scott (ankle) and Antwon Murchison (concussion), linebacker Josh Miller (oral surgery), tailback James Davis (bruised shoulder) and offensive tackle Christian Capote (separated shoulder) remained sidelined. All but Davis are expected out until Monday.