The Cardinals released Kirklin from their practice squad Tuesday, Aaron Wilson of ProFootballNetwork.com reports.
Kirklin was waived by Arizona ahead of the 53-man roster deadline, but he quickly landed a spot on the Cardinals' practice squad. However, he's been let go ahead of Week 1. The 5-foot-11 wideout originally signed with the Cardinals in May as an undrafted free agent out of LSU, where he caught 19 passes for 308 yards and three scores across his final three seasons.