St. Louis, MO (Sports Network) - Arizona Cardinals quarterback Matt Leinart left Sunday’s 34-31 victory over the St. Louis Rams in the second quarter with a fractured left collarbone.

The injury occurred on a sack late in the first half, and Leinart appeared in obvious pain on the bench before being escorted to the trainer’s room with the game tied at 10-10. He watched the rest of the contest from the sideline with his left arm in a sling.

Leinart was 7-of-13 for 100 yards with one interception in the game. He was replaced by veteran Kurt Warner, who had already been sharing time under center in the last two contests, coming off the bench to lead a no-huddle formation.

Warner finished 14-of-28 for 190 yards, with one TD and one interception.