New England Patriots tight end Aaron Hernandez (81) talks with wide receiver Wes Welker (83) while stretching during NFL football practice at the team's facility in Foxborough, Mass., Thursday, Jan. 10, 2013. The Patriots host Houston Texans in an AFC division playoff game on Sunday. (AP Photo/Stephan Savoia)

New England Patriots tight end Aaron Hernandez, right, talks with wide receiver Deion Branch (84) as they stretch during NFL football practice at the team's facility in Foxborough, Mass., Thursday, Jan. 10, 2013. The Patriots host Houston Texans in an AFC division playoff game on Sunday. (AP Photo/Stephan Savoia)

New England Patriots tight end Aaron Hernandez stretches during NFL football practice at the team's facility in Foxborough, Mass., Thursday, Jan. 10, 2013. The Patriots host the Houston Texans in an AFC divisional playoff game on Sunday. (AP Photo/Stephan Savoia)

New England Patriots special teams coach Scott O'Brien talks to quarterback Tom Brady (12) as backup quarterback Ryan Mallett looks on during NFL football practice at the team's facility in Foxborough, Mass., Thursday, Jan. 10, 2013. The Patriots host the Houston Texans in an AFC divisional playoff game on Sunday. (AP Photo/Stephan Savoia)

New England Patriots quarterback Tom Brady throws a pass during NFL football practice at the team's facility in Foxborough, Mass., Thursday, Jan. 10, 2013. The Patriots host the Houston Texans in an AFC divisional playoff game on Sunday. (AP Photo/Stephan Savoia)

New England Patriots quarterback Tom Brady throws a pass during NFL football practice at the team's facility in Foxborough, Mass., Thursday, Jan. 10, 2013. The Patriots host the Houston Texans in an AFC divisional playoff game on Sunday. (AP Photo/Stephan Savoia)

New England Patriots tight end Rob Gronkowski (87) holds a football during practice at the NFL football team's facility in Foxborough, Mass., Thursday, Jan. 10, 2013. The Patriots are scheduled to host the Houston Texans in an AFC division playoff game Sunday. (AP Photo/Stephan Savoia)