Miami Dolphins linebacker Koa Misi's season has ended two days before the start of training camp.

A six-year starter, Misi was placed on injured reserve Tuesday after he failed to receive medical clearance. Misi suffered a career-threatening neck injury last season and played in only three games.

The Dolphins also signed cornerback Alterraun Verner, an eight-year NFL veteran who started 70 games for the Titans and Buccaneers. He is expected to compete for playing time at slot cornerback.