The Saints re-signed Mathieu on a two-year, $13 million contract Thursday, Josina Anderson of CBS Sports reports.
Mathieu recorded five tackles (three solo) in Sunday's 23-13 win at Tampa Bay.
Mathieu recorded nine tackles (six solo) and a pass breakup in the Saints' 30-22 loss to the Rams on Thursday.
Mathieu racked up nine tackles (six solo) and one pass defensed during Thursday's 30-22 loss to the Rams.
Mathieu (foot) is active for Sunday's game against the Colts, John Hendrix of SI.com reports.
The Saints have ruled Mathieu (foot) questionable to play Sunday versus the Colts.
Mathieu (foot) was a limited participant at practice Wednesday.
Mathieu (foot) is active for Thursday night's game against the Jaguars.
Mathieu is questionable for Thursday's game against the Jaguars with a foot injury.
Mathieu (foot) was marked as a limited participant in the Saints' practice estimate Monday, John Hendrix of SI.com reports.