The Buccaneers waived Niklas (leg) with an injury designation Sunday, Scott Smith of the team's official site reports.
The veteran tight end reunited with former Cards coach Bruce Arians on the eve of training camp, but he sustained a leg injury in Friday's opening practice. After he was unable to return to the field over the weekend, Niklas was a natural candidate for release when the team needed a roster spot to ink Vincent Testaverde as an extra training camp arm. Injuries contained Niklas to just 19 receptions for 203 yards and three touchdowns in Arizona between 2014 and 2017.