Junior college cornerback Ronnie Martin has signed a national letter of intent with the University of South Carolina. Martin, a 5-10, 180-pounder from Spartanburg, S.C., originally signed with the Gamecocks in February 2011. He has spent the past two seasons at Georgia Military College in Milledgeville, Ga., where he was coached by Bert Williams. He saw limited playing time in 2012, as he was sidelined early in the season with a hamstring injury. In the three games prior to the injury, he logged 10 tackles and three interceptions, while forcing a pair of fumbles. He was regarded as the fifth-best junior college cornerback in the nation, according to 247Sports.