The signing comes four days after Gresham visited with the Cardinals. Gresham deepens a tight end depth chart that took a hit when John Carlson unexpectedly retired earlier this offseason. Gresham is the only true pass-catching threat in a group that includes Darren Fells and Troy Niklas, a second-round pick last season.
Circumstances conspired to keep Gresham on the market longer than expected. He was close to a deal with the Raiders that was scuttled when a physical turned up a herniated disc in his back that required surgery in March. Oakland remained interested in Gresham's services, as had the Bears and Packers.
Bruce Arians' offense isn't known for big production at the tight-end position, but Gresham has the potential to make plays. He twice went to the Pro Bowl in his run with the Bengals, averaging 56 catches and 544 yards in five seasons. In 2014, he had 62 receptions for 460 yards and five touchdowns.