Houston Texans offensive tackle Rashad Butler is out for the season with a torn triceps.
"Unfortunate," coach Gary Kubiak said announcing the injury. "Tough, tough deal."
The Texans released right tackle Eric Winston, who signed with the Chiefs as a free agent, opening the training camp competition at the position between 2011 seventh-rounder Derek Newton and Butler.
Butler was capable of filling in at left tackle behind Duane Brown.
Newton won the right tackle job, but there is little depth behind the starting tandem.