Although he still completed 16 of his 22 passes in a key win over Oklahoma State, Kansas State quarterback Collin Klein reportedly played with a concussion on Saturday according to Dan Wetzel of Yahoo! Sports.

The senior quarterback initially looked to have injured his arm or wrist in the third quarter against the Cowboys, and was quickly taken to the sideline while backup quarterback Daniel Sams commanded the offense. Instead of an arm injury however, the report indicates that after Klein's lone scoring play of the night the senior did not even know that he had found the end zone.

Klein stood on the sideline without his helmet and watched the remainder of the game with his teammates, but this is clearly a very problematic issue for the No. 3 team in America. Even if Klein did not actually play with a concussion on Saturday, the possibility that he did is extremely serious for all involved.

Source: KState's Collin Klein was taken out Saturday over concerns of a possible concussion. Didn’t know he just scored TD. Story coming

— Dan Wetzel (@DanWetzel) November 4, 2012