Indianapolis Colts running back Zack Moss suffered a broken arm during training camp practice, and is expected to miss roughly six weeks. Mike Garafolo of NFL Network was the first to report the news, tweeting: “#Colts RB Zack Moss suffered a broken arm at practice today, source says. Expected to miss about six weeks.”

Moss left practice early after suffering the injury during team drills, and was seen visibly frustrated after slamming his helmet down while holding his wrist.

The 25-year-old Moss is in the final year of his rookie contract; he joined the Colts in a November trade from the Buffalo Bills. He totaled 495 yards from scrimmage and a touchdown in 13 games last season. Evan Hull, Jake Funk and Deon Jackson are the other running backs on the Colts roster.

The Colts preseason opener against the Buffalo Bills will take place at 1 p.m. EDT Aug. 12 in Orchard Park, N.Y.

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