"Detroit Lions running back Kevin Smith said it was important to test his sprained right ankle in practice today to make sure he could make certain cuts with the injury. He found out he couldn't.

Smith left the open portion of practice today after pulling up during his first pass route out of the backfield in a skeleton offense drill. He walked immediately off the field, leaving his status for Sunday's must-win game against the Minnesota Vikings is in doubt.

Maurice Morris will start with Keiland Williams and Aaron Brown as his backups if Smith cannot play."