Tempe, AZ (SportsNetwork.com) - The Arizona Cardinals are dealing with many key injuries following Sunday's 29-18 loss to the Atlanta Falcons.

The Cardinals watched safety Tyrann Mathieu (thumb), right guard Paul Fanaika (ankle) and running back Andre Ellington (hip pointer) exit the game early. In addition, left tackle Jared Veldheer suffered an ankle injury late in the contest.

Mathieu has a broken left thumb and his status for Sunday's game against Kansas City is unknown. He was at the doctor as Arizona coach Bruce Arians met with the media Monday.

Arians said Mathieu could have a pin inserted in the thumb to help it heal, a procedure that would cost him three weeks. There is also a chance Mathieu will be able to cast it up and play.

Fanaika, Ellington and Veldheer will be monitored as the week progresses.

Arians also said that wide receiver Larry Fitzgerald, who has missed the past two games with a sprained MCL in his left knee, should be able to practice on Wednesday.

Linebacker Matt Shaughnessy (knee) is expected to play Sunday. He has been practicing but wasn't allowed to be activated until this week after being placed on the injured reserve-designated to return list earlier this season.