Former LSU football star called it a career this week, announcing his retirement from the NFL. Mathieu was a Heisman finalist while at LSU.

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.

After Tyrann Mathieu announced his retirement, Chiefs QB Patrick Mahomes sent some kind words to his former teammate.

The New Orleans Saints got three truly impressive seasons out of Tyrann Mathieu, and as he retires, take a look back at each INT he took away.

A former Arizona Cardinals player who was key during their run of success in the middle of the 2010s has called it a career. Safety Tyrann Mathieu, originally drafted by the Arizona Cardinals, announced his retirement from the NFL after 12 seasons. He made the announcement on his Instragram account.

Mathieu’s NFL career came to a surprising end Tuesday afternoon when he announced his retirement on the eve of start of Saints’ training camp. His retirement leaves a hole at the safety position, giant shoes for someone to try to fill. This would have been Mathieu’s fourth season with the Saints and his 13th in the NFL.

The New Orleans Saints are reportedly signing veteran safety Julian Blackmon, according to Ian Rapoport of NFL Network.

It didn't take long for the Saints to find Tyrann Mathieu's replacement. Former Colts safety Julian Blackmon is a young playmaker with a lot to prove.

The New Orleans Saints ' secondary took a hit on Tuesday when three-time Pro Bowl safety Tyrann Mathieu announced his retirement at 33 years old. However, the Saints worked quickly to bring in a replacement. According to NFL Media, New Orleans is signing former Indianapolis Colts safety Julian Blackmon.

Tyrann Mathieu announced his retirement from the NFL on Tuesday, and his former Kansas City Chiefs teammate Patrick Mahomes was quick to congratulate the safety on social media.

There was no player ever at LSU like Tyrann Mathieu. Like his namesake wild animal, the Honey Badger, he took what he wanted during brief, brilliant career.