David Boston was released by the Buccaneers on Wednesday, two days after police released results of a urine test that showed the eighth-year pro had a depressant in his system when he was arrested and charged with driving under the influence last month. The Bucs said Boston, who hurt his foot during pregame warmups and did not play in last Sunday's season opener at Seattle, was let go after reaching an injury settlement. Receiver/kick returner Mark Jones was signed to replace him.