A source told Jeremy Fowler that the Kansas City Chiefs safety is "good to go" for the game.
The source said that the Kansas City safety will play on Sunday despite having a concussion last week.
The Pro Bowl selection led the Chiefs in turnovers with three and returned one for a touchdown.
A nine-year NFL veteran out of LSU, Mathieu, 29, is in his third season with the Chiefs, after stops with the Houston Texans and Arizona Cardinals.
Kansas City has made the past two Super Bowls, winning one, and now has an opportunity for a third straight appearance with the addition of Mathieu.