Three-time All-Pro safety Tyrann Mathieu announced in a post on his Instagram page that he is retiring from the NFL. The 33-year-old defensive back was entering his fourth season with the New Orleans Saints but won't step onto the field this year.

Tyrann Mathieu announced his retirement from the NFL. Mathieu played 12 NFL season, including five with the Cardinals. PHOENIX - Former Arizona Cardinals safety Tyrann Mathieu took to social media on Tuesday to announce his retirement from the NFL.

New Orleans Saints safety Tyrann Mathieu is retiring after 12 NFL seasons, the team announced Tuesday.