Bill McCartney is an all-timer at Colorado. USATSI

Legendary Colorado coach Bill McCartney recently received a diagnosis for "late-onset Dementia/Alzheimer's," his family announced on Monday.

It's terribly sad news for the hall of famer and his family, which includes his grandson, Derek, who is currently an outside linebacker on the Colorado football team.

The family wrote the following in a statement released by the school.

"We would like to share the news that our father, Coach Bill McCartney has been diagnosed with late-onset Dementia/Alzheimer's. We (his family) have been noticing memory issues for the past few years and he was recently diagnosed. He is receiving treatment and we are hoping this slows the progression of the disease. He is still the same Coach Mac - biking, golfing, supporting the Buffs and being an active member of his Church.

"We are making this public to ask for your understanding and patience as we know he frequently runs into fans, friends and former players. This is a frustrating and confusing disease, and if he appears disconnected or unknowing, please don't take it personally."

McCartney is the all-time winningest coach in Colorado football history. He led the Buffs to a national championship in 1990 and was inducted into the College Football Hall of Fame in 2013.