Franklin, a 6-foot-1, 307-pound nose guard expected to compete for playing time behind starter Kelly Gregg and Maake Kemoeatu, recorded 56 tackles, 10 quarterback pressures, five tackles for losses with two sacks and a forced fumble last season for the Volunteers.
He transferred from Itawamba Community College (Miss.) where he converted to the defensive line after an all-state prep career as a linebacker in Johnston City, Tenn.
Meanwhile, the Ravens' director of football administration Pat Moriarty negotiated in Walnut Creek, Calif., with Mike Sullivan, the agent for first-round pick and starting quarterback candidate Kyle Boller.
Sullivan said negotiations are going well and that he doesn't anticipate any problems getting Boller signed to a contract before the Ravens report to training camp in July 27.