Dolphins lose top cornerback to Chiefs

The Miami Dolphins' already thin cornerback position took another hit on Thursday. The Kansas City Chiefs signed former Dolphin 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 are shutdown corners. Miami need to dig deep in the draft and/or free agency to sure up its pass defense.