The Titans released Geathers on Sunday.
Geathers signed a contract with Tennessee on Monday, Jim Wyatt of the team's official site reports.
Geathers plans to suit up for the 2021 season after having opted out in 2020, Ian Rapoport of NFL Network reports.
Geathers recorded 54 tackles, one pass breakup and one interception over 15 games in 2019.
Geathers has cleared the league's concussion protocol Monday, Mike Wells of ESPN.com reports.
Geathers (concussion) is practicing in some capacity Monday, Kevin Bowen of 1070 The Fan Indianapolis reports.
Geathers (concussion) is ruled out for Sunday's game versus the Chiefs, Zak Keefer of The Athletic reports.
Geathers (concussion) didn't participate in Wednesday's practice, Kevin Bowen of 1070 The Fan Indianapolis reports.
Geathers is in the concussion protocol Monday, Mike Chappell of Fox 59 News Indianapolis reports.
Geathers had five total tackles in Sunday's loss at the Chargers.