FOXBORO, Mass. (AP) _ The New England Patriots have signed free agent cornerback Antonio Langham and rookie free agent long snapper Thad Sheldon.

Langham was a first-round draft pick who began his career in 1994 with the old Cleveland Browns. The 27-year-old player had stints with the Baltimore Ravens and San Francisco 49ers before moving last season to the expansion Cleveland Browns.

The Patriots also announced that Ernie Adams has been appointed as football research director.