Tennessee signed Bachie (foot) from the practice squad to the active roster Thursday, Jim Wyatt of the team's official site reports.
Bachie suited up for five regular-season games with the Colts this year prior to being placed on IR and then cut with an injury settlement. Across that span, he racked up 26 tackles (11 solo) and one pass defensed. Now healthy, he'll be eligible to contribute as a member of Indianapolis' linebacker corps behind Cody Barton and Cedric Gray.