Arizona Cardinals safety Tyrann Mathieu's rookie season is officially over after he suffered a torn ACL and LCL in his left knee.

Mathieu started every game this season for Arizona. The rookie out of LSU suffered the injury on special teams when returning a free kick (after a Cardinals safety on the Rams) in the third quarter, getting dog piled by the St. Louis special teams.

After the play, Mathieu attempted to jog off the field, only to fall to the turf in pain. He was carted off the field, blowing a kiss to the Cardinal fans on his way to the locker room.

Mathieu's surgery will be delayed, as he must wait for his torn LCL to begin healing before he can be operated on. Typical rehab for a torn ACL and LCL is typically 9 months. He took to twitter earlier today to express gratitude to his well wishers.

twitter/@Mathieu_Era

Despite the injury, Mathieu is still in contention for NFC defensive rookie of the year after piling up 68 tackles, 1 sack, 1 forced fumble, 2 interceptions, and multiple contributions on special teams.