Shedeur Sanders is celebrating his Senior Day at Folsom Field by rewriting the Colorado football record ... which was set by Koy Detmer in 1996, according to beat writer Brian Howell.

Shedeur Sanders woke up early Friday, won a national award, and then set No. 23 Colorado's all-time single ... came in needing 40 yards to pass Koy Detmer's 28-year-old record of 3,527 yards.