The Dolphins are not through trying to bolster their defensive front.

Even with every starter from a year ago returning, the team brought former Chargers defensive end Vaughn Martin in for a visit Tuesday.

Martin is a Jamaican-born Canadian who played collegiate ball at the University of Western Ontario.

Martin, 26, started 12 games last year, logging 19 tackles and a sack. The team had some interest in Elvis Dumervil, but he signed with the Ravens this week.