When Buffalo Bills quarterback Kevin Kolb suffered his concussion earlier this preseason, there was talk that it could ultimately end his playing career. While Kolb has since said that the head injury won’t force him into retirement, it has ended his season. The Bills announced yesterday that Kolb has been placed on season-ending injured reserve, according to NFL.com.

While most teams might be more willing to give a player time to show he can recover from a similar head injury prior to designating him to IR, Kolb’s history of concussions resulted in a swift decision from the Bills. The signal caller struggled to return from a concussion last season as a member of the Arizona Cardinals, and he has a long history of head injuries dating back to college.

Kolb entered training camp in a heated competition with rookie EJ Manuel for the Bills’ starting quarterback gig. Both Kolb and Manuel have since battled injuries, and Buffalo is now slated to start undrafted rookie Jeff Tuel Week 1 against the New England Patriots. That could change if Manuel proves healthy by next weekend, but that is not a guarantee at this point.