Cardinals running back Andre Ellington got off to a fast start to the season Sunday against New Orleans. But a torn PCL could interrupt that season, at least temporarily.
He will undergo an MRI on Monday to determine the extent of the injury.
Ellington did lead the team with 12 carries for 69 yards before going down. He also scored on a 1-yard run in the second quarter and added a catch for seven yards.
Arizona plays at Chicago in Week 2, but it appears unlikely that Ellington will participate.