Rookie defensive back Tyrann Mathieu has signed with the Arizona Cardinals, the team announced Thursday.

Robert Griffin III says he cried after his knee surgery and changed his cellphone passcode to the date of the Washington Redskins season opener as he began his rehabilitation process.

Dallas Cowboys nose tackle Josh Brent will attend a hearing on Friday morning to determine if he violated the conditions of his bail. According to the Dallas County District Attorney's office, Brent's alcohol monitoring device detected alcohol.

New England Patriots quarterback Tom Brady said on Thursday morning that Wes Welker's free-agent departure to the Denver Broncos did not come as a surprise, as he's played in the NFL long enough to understand the nature of the business.

Chiefs wide receiver Dexter McCluster hurt his hamstring early in Thursday's voluntary workout, while defensive back Neiko Thorpe and linebacker Mike Catapano also picked up minor injuries.