Doucet, a third-round draft pick in 2008, has been plagued by injuries much of his NFL career. He caught 28 passes for 207 yards in 12 games last season. For his Arizona career, Doucet had 139 catches for 1,491 yards and seven touchdowns in 54 games.
Hoyer, signed by Arizona late last season, is a restricted free agent but Arizona has the right to match any offer. If they decide not to match, the Cardinals will receive a second-round draft pick as compensation.