http://sports.yahoo.com/nfl/news;_yl...v=ap&type=lgns
Jets running back Curtis Martin won't practice when training camp opens Friday because of a lingering knee injury.
Martin was placed on the physically unable to perform list Thursday, along with receiver Justin McCareins and center Trey Teague. The 33-year-old Martin had arthroscopic surgery last December to clean out his right knee, then was limited during minicamp last month.