Hartline was scheduled to make $5.9 million this season. He agreed to a five-year, $31 million contract with $12.5 million guaranteed in 2013 after catches 74 passes for 1,083 yards the year before.
Gibson signed a three-year deal with Miami in 2013. He had 30 catches for 326 yards in seven games that year before tearing his patella tendon. In 2014, he caught 29 passes for 295 yards.
Hartline has 298 career catches for 4,243 yards and 12 touchdowns. He had only 39 receptions for a career-low 474 yards and two touchdowns while playing in all 16 games in 2014.
Cutting both receivers gives the Dolphins an additional $6.5 million in salary cap space.
Miami also has a decision to make on wide receiver Mike Wallace. Dolphins executive vice president of football operations Mike Tannenbaum refused to comment on rumors about the team’s plans for Wallace, according to the Miami Herald.
“Mike’s on our team,” Tannenbaum said. “We don’t comment to rumors.”
The Dolphins went 8-8 for the second straight year in 2014 and have missed the playoffs in each of the last six seasons.
- Scooby Axson