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Will Allen sent to have (repaired?) knee examined

Several comings and goings and one sobering injury update today from Dolphins camp:

First, cornerback Will Allen, who missed the past couple of days while "resting" his surgically repaired knee, was sent to the doctor to have that knee checked, according to coach Tony Sparano. That is obviously not great news because it is not a routinely scheduled visit.

Allen missed most of last season after blowing out the knee against the New Orleans Saints the sixth game of the season.

The Dolphins signed free agent cornerback Kevin Hobbs but that is thought to only address the need created by the injury earlier this week to Evan Oglesby, who sustained an ankle injury. Oglesby was placed on injured reserve today.

The team also worked out veteran CBs Frank Walker and Matteral Richardson on Wednesday but didn't make a roster move with either, yet.

One would assume the Dolphins will wait on the Allen report before taking deciding on their next step at the position. In the meantime, the coaches will have their eyes on Nolan Carroll, who has been impressive so far, to see if he is more than a special teams guy. They want to see if he merits more confidence than that of a rookie learning the ropes on the bench.

The Dolphins waived wide receiver Taurus Johnson and used that spot to re-sign guard Ray Feinga.Feinga had previously been let go when he was nursing a concussion. He practiced this morning.

Jake Grove was back practicing this morning.

The Dolphins will play their preseason opener Saturday versus Tampa Bay. Sparano said quarterback Chad Henne will start and play approximately one quarter, depending on how many snaps he actually gets.