DAVIE, Fla. -- Free agency has been fairly good to the Miami Dolphins. But free agency hasn't completely filled Miami's need for starting-caliber players.

That's why many expect the Dolphins (8-8 last season) might favor selecting an offensive lineman in the first round of next month's draft, possibly Notre Dame tackle Zack Martin, if he is available.

The Dolphins signed arguably the top free agent on the market for the second consecutive year when they got left tackle Branden Albert, the Pro Bowl performer who came over from Kansas City. Albert joins Pro Bowl center Mike Pouncey to establish a foundation on one of the league's worst offensive lines.

Last year the Dolphins signed wide receiver Mike Wallace, who was arguably the top free agent on the market.

Miami reached another free agency goal this year by signing running back Knowshon Moreno from Denver. He should be an immediate upgrade because he can carry the ball effectively, protect the quarterback and catch the ball out of the backfield.

Elsewhere, however, there are questions. The offensive line needs three starters -- right tackle, left guard and right guard. The Dolphins signed ex-Detroit right tackle Jason Fox and ex-St. Louis guard Shelley Smith. But it's not known whether either will ultimately be a starter.

The same goes in the secondary where the Dolphins signed ex-St. Louis cornerback Cortland Finnegan and ex-Detroit safety Louis Delmas.

On the defensive line, Miami seemed to make a good signing with Earl Mitchell, the tackle from Houston. He will be in the rotation behind starters Randy Starks and Jared Odrick.

But the Dolphins still have holes among starters.

As for first-round draft possibilities, Miami could go with right tackle, middle linebacker, tight end, or safety.

If Martin is there, he will likely be the selection. If not, the door is open for the likes of Alabama linebacker C.J. Mosley, Alabama tackle Cyrus Kouandjio, North Carolina tight end Eric Ebron, Alabama safety Ha Ha Clinton-Dix, or Louisville safety Calvin Pryor.