To make room for them, the Dolphins waived tight end Shawn Draper and terminated the contract of linebacker Scott Galyon.
In addition, the Dolphins filled four of their openings on the practice squad by signing running back Leonard Henry, guard Dwayne Pierce, wide receiver Sam Simmons and linebacker Joshua Symonette.
Clark, a fourth-year veteran out of Wake Forest, was waived/injured by Denver on Saturday. He has a dislocated left forearm and will be out of action for a while. A sixth-round draft choice by the Broncos in 1999, Clark enjoyed his most productive season in 2001 as he finished the year as the team's second-leading receiver with 51 catches for 566 yards and six touchdowns.
Harrison, a third-round pick of Washington in 2000, also was waived on Saturday. He played in 12 games for the Chargers last season.