Broncos receiver Wes Welker suffered a concussion after taking a hit to the head from Houston defensive back D.J. Swearinger in a preseason game Saturday night. Welker was leveled by Swearinger soon after catching a short pass over the middle with just seconds remaining in the second quarter. Swearinger drew an unnecessary roughness penalty for the hit on Welker, who has a history of concussions and wears a bigger helmet to further protect his head. Denver coach John Fox said Welker won't return to the field until he goes through the league's concussion protocol. More...