The Colts have invited a number of tryout players to minicamp, including cornerback Phillip Adams and former Giants tight end Larry Donnell (Twitter link via Mike Chappell of CBS4). 
At this stage of the offseason, Donnell stands as one of the most notable tight ends remaining on the open market. The Grambling State product first made a name for himself in 2014 when he had a breakout season with the Giants, catching 63 passes for 623 yards and six scores. Since then, however, he has been hampered by injuries and has been unable to reprise that performance. He missed half of the 2015 season and found himself with a lesser role in the offense in 2016. Donnell is coming off of a season with just 15 catches (22 targets) for 92 yards and one score.
Adams, 29 in July, has played for six different teams across six NFL seasons. In 2016, he was out of a job, but he’s hoping to hook on with someone for the upcoming year.