Tyrann Mathieu isn't completely closing the door on a return to the NFL, but for now, the former Super Bowl champion and three-time first-team All-Pro remains confident in his decision after announcing his retirement Tuesday.

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.

In a late-July surprise, Tyrann Mathieu is calling it a career. The decorated safety is retiring after 12 NFL seasons, the Saints announced Tuesday. Nick Shook takes a look at Mathieu's legacy and New Orleans' future.