Isabella was let go from the Steelers' practice squad Tuesday, Teresa Varley of the team's official site reports.
Isabella spent the first two months of the regular season without a team after failing to make the Bills' 53-man roster at the end of training camp. He managed to catch on with the Steelers' practice squad Oct. 25, but he was not elevated for a game. Assuming he clears waivers, Isabella will look to join a team in need of depth at wide receiver.