New England Patriots running back Danny Woodhead (39) runs a drill with teammates during NFL football practice in Foxborough, Mass., Wednesday, Jan. 2, 2013. . The Patriots don't know who they'll face in their playoff opener. But, they do know plenty about that team. They are familiar with all three potential opponents, the Texans, Ravens and Colts, having played them already this season. (AP Photo/Charles Krupa)

New England Patriots head coach Bill Belichick pauses during a news conference before NFL football practice in Foxborough, Mass., Wednesday, Jan. 2, 2013. The Patriots don't know who they'll face in their playoff opener. But, they do know plenty about that team. They are familiar with all three potential opponents, the Texans, Ravens and Colts, having played them already this season.(AP Photo/Charles Krupa)

New England Patriots wide receiver Wes Welker (83) gets ready to run a team drill during NFL football practice in Foxborough, Mass., Wednesday, Jan. 2, 2013. . The Patriots don't know who they'll face in their playoff opener. But, they do know plenty about that team. They are familiar with all three potential opponents, the Texans, Ravens and Colts, having played them already this season. (AP Photo/Charles Krupa)

New England Patriots running back coach Ivan Fears, right, instructs running backs Stevan Ridley (22) and Danny Woodhead (39) during NFL football practice in Foxborough, Mass., Wednesday, Jan. 2, 2013. . The Patriots don't know who they'll face in their playoff opener. But, they do know plenty about that team. They are familiar with all three potential opponents, the Texans, Ravens and Colts, having played them already this season. (AP Photo/Charles Krupa)

New England Patriots wide receiver Wes Welker is surrounded by members of the media in the locker room after an NFL football practice in Foxborough, Mass., Wednesday, Jan. 2, 2013. (AP Photo/Charles Krupa)

New England Patriots cornerback Aqib Talib talks with reporters in the locker room after an NFL football practice in Foxborough, Mass., Wednesday, Jan. 2, 2013. (AP Photo/Charles Krupa)

New England Patriots defensive end Chandler Jones talks with reporters in the locker room after an NFL football practice in Foxborough, Mass., Wednesday, Jan. 2, 2013. (AP Photo/Charles Krupa)