The Panthers waived Kirkwood on Tuesday, Darin Gantt of Panthers.com reports.
Kirkwood suffered a severe concussion during a training-camp practice, causing him to be taken off the field on a stretcher and immediately sent to the hospital. The move was made without an injury designation, so it appears that he has fully healed from the incident. Kirkwood caught one of two targets for 13 yards during his lone regular-season appearance in 2020 and will likely land on a practice squad during the 2021 campaign.