Welker popped back up after taking a hit to the head from Texans safety D.J. Swearinger in Saturday night's 18-17 preseason loss to Houston. Considering his history, though, trainers immediately escorted him to the locker room for concussion tests. Welker did not return, and John Fox announced after the game that Welker indeed suffered a concussion.
Swearinger had raised the ire of Broncos players for running his mouth in joint practice this week.
The Broncos already had concerns about Welker's ability to make it through the entire season unscathed. Here's hoping that the head strikes won't put his career in jeopardy.