The Washington Redskins on Thursday placed both safety Tanard Jackson and running back Tristan Davis on the physically unable to perform list. Jackson had been released by the Tampa Bay Buccaneers in April due to a failed physical, but was signed a short time later by the 'Skins. The 27-year-old, who underwent offseason shoulder surgery, was suspended for over a year in 2010 for violating the NFL's substance abuse policy. He started 10 games last season after being reinstated and finished with 35 tackles and two interceptions. Davis is a 26-year-old undrafted Auburn product. Source: The Sports Network
