Austin announced his retirement Tuesday, ESPN reports.
The Bills cut Austin from their practice squad Thursday, Aaron Wilson of ProFootballNetwork.com reports.
Austin was released from the Bills' practice squad Wednesday, Sal Capaccio of WGR Sports Radio 550 Buffalo reports.
Austin signed with the Bills' practice squad Wednesday, Alex White of the team's official site reports.
Austin was released by the Bills on Monday.
The Bills signed Austin to a one-year contract Friday.
Austin (coach's decision) is inactive for Sunday's game against the Colts.
Austin caught six of seven targets for 68 yards and had three carries for 21 yards during Sunday's 26-21 loss to the Jets.
Austin caught three of five targets for 17 yards during Sunday's 20-0 loss at Tennessee.
Austin caught both his targets for 21 yards and a touchdown during Sunday's 21-14 loss to the Falcons.