The Miami Dolphins have added some solid players at the start of NFL Free Agency. But these three positions are still of grave concern to us.

With the first — and usually most significant — wave of free agency now done, it was time for a second On SI network mock draft, with the publishers predicting

Joe Schad has produced four mock drafts, with picks including offensive and defensive lineman. The Miami Dolphins have NFL Draft needs at guard, cornerback and defensive tackle. Dolphins general manager Chris Grier and coach Mike McDaniel have 10 picks to work with and may also look to select a tight end, safety and defensive end.