Sources: Tarvaris Jackson to Bills/ The Seattle Seahawks have agreed to trade quarterback Tarvaris Jackson to the Buffalo Bills for an undisclosed draft pick, league sources told ESPN NFL Insider Adam Schefter on Sunday Colts trade for CB Vontae Davis/ Four days after team owner Jim Irsay ignited speculation about a possible trade with a series of Twitter posts, the Colts nabbed former first-round draft pick Vontae Davis to solidify their secondary David DeCastro tears MCL; ACL OK / Pittsburgh Steelers right guard David DeCastro dislocated his knee cap, tore his medial collateral ligament and suffered some damage to his patellar tendon. But his anterior cruciate ligament is intact, according to sources Terrell Owens tweets: 'I'm no longer a Seahawk/