The deadline for underclassmen to declare for the NFL draft is Tuesday, giving eligible players six more days to toss their hat in the ring.
Four running backs have already announced they will forgo future college eligibility to turn pro, including Illinois' Rashard Mendenhall.
The other backs are Rutgers' Ray Rice, Central Florida's Kevin Smith and Jamaal Charles, who replaced Cedric Benson at Texas.
Three offensive tackles have also declared early, headlined by Boise State's Ryan Clady, who is considered a sure first-round selection. Also declaring are Kansas' Anthony Collins and Middle Tennessee State's Franklin Dunbar.