The veteran suffered a concussion in the third preseason game and was later placed on injured reserve. At the time, ESPN NFL Insider Adam Schefter reported that the Bills were taking it slow with Kolb, who has a history of concussions.
On Monday, coach Doug Marrone was asked for an update on Kolb.
"I haven’t seen Kevin," he said.
Marrone said he has yet to speak to doctors about Kolb potentially returning to the team. Kolb, 29, is under contract through next season, at a base salary of $2 million.