Fullback Kevin Mack was released from prison...

Fullback Kevin Mack was released from prison after serving one month of a six-month drug term, and has returned to the Cleveland Browns, although it remains unclear when he will be able to play.

Mack, 27, was arrested June 28 and charged with cocaine possession, aggravated drug trafficking and possession of criminal tools. But the charges were reduced to a single count of cocaine use.

The Browns have asked the NFL for a roster exemption so that Mack would not have to be placed on their 47-player roster while getting into shape.