The Arizona Cardinals are worried that quarterback Carson Palmer suffered a torn ACL in his left knee during Sunday's game against the St. Louis Rams. Arizona won the game 31-14 but losing Palmer would be a huge blow to the team. Coach Bruce Arians responded to reporters, "We don't know anything about Carson's injury or the length or whatever it is yet." Arians is scheduled to address the media again Monday afternoon. The injury comes just two days after he signed a three-year contract extension worth a reported $50 million, including $20.5 million guaranteed. Carson Palmer was carted off the field after injuring his left knee Sunday. This isn't the first time Palmer got injured just after signing a new contract. The last time Palmer suffered a similar knee injury, he signed a six-year, $118 million contract on Dec. 29, 2005 -- just 10 days before tearing his ACL and MCL. We hope that he is okay.