Arizona Cardinals safety Tyrann Mathieu will undergo surgery on his fractured left thumb on Wednesday and could be sidelined until the team's regular-season finale.

Mathieu will have a pin inserted in the thumb. The Cardinals said Tuesday that the thumb would need a couple of weeks to heal, then Mathieu would play with it in a cast.

Coach Bruce Arians said Monday that, if Mathieu needed surgery, he would be out three weeks. That would have him returning for the team's final regular-season game Dec. 28 at San Francisco.

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