Any injury that forces a key cog off the field in a training camp practice is reason for concern.

It’s always best to wait and see before making the ultimate assessment.

So we await word from the Texans on the status of left tackle Duane Brown, who injured his left ankle Wednesday, but stayed on the field for a few additional plays before stepping out.

John McClain of the Houston Chronicle reports the team flipped Rashad Butler, the favorite for the open right tackle job, to the left side, and put Derek Newton in on the right side.

Per tweets from Mark Berman, Gary Kubiak said:

"He got rolled up. It's always a scare. He did walk off on his own." "We'll hold our breath. Hopefully he's okay. He did play a couple of plays after he did it.”

Hopefully X-rays will be negative and Brown won’t be gone for long.

He’s emerged as one of the league’s better left tackles. He’s perfectly suited for the Texans’ system. And he’s heading into a contract year.