"A veteran of 12 NFL seasons, Warner, 38, led the St. Louis Rams to a pair of Super Bowls and the Cardinals to one in 2009. The 1999 Rams were NFL champions and Warner was regular season and Super Bowl MVP.

"He has had a dominant career. He's a good person," Cardinals defensive tackle Darnell Dockett said. "He's got to do what's best for his family. He played long enough. He took us to the Super Bowl last year. We had a great season this year. It's a good thing. If you're going to go out, go out on top.""