Dolphins lose top cornerback to Chiefs

The Miami Dolphins' already-thin cornerback position took another hit on Thursday. The Kansas City Chiefs signed former Dolphins corner Sean Smith to a three-year contract, ESPN's Adam Schefter reports.

Like the Dolphins, Kansas City has been very aggressive in free agency. The Chiefs signed various free agents the past three days, including two former Dolphins in Smith and tight end Anthony Fasano. Both were former starters in Miami, and the Dolphins need to plug both holes in the starting lineup.

Miami’s pass defense was suspect last year even with Smith in the lineup. The Dolphins ranked 27th against the pass last season. Smith was the most talented of the group but he's also inconsistent at times. Still, Smith has the ideal height, size and athleticism for the position. Miami would have liked to keep Smith but only at a team-friendly rate. That’s why it’s no surprise another team swooped in and signed Smith in free agency.

The Dolphins' top remaining cornerbacks on the roster include Richard Marshall and Dimitri Patterson. Both have starting experience but neither is a shutdown corners . Miami needs to dig deep in the draft and/or free agency to shore up its pass defense.