Former NFL coach Marty Schottenheimer left the NFL in 2006 as the seventh-most winningest coach in NFL history. In retirement, Schottenheimer has been battling his most daunting opponent yet, Alzheimer's Disease.
The video of it is seen here: http://www.espn.com/video/clip?id=20896213
I know some people enjoyed watching him coach, some felt he was over rated, a lot were baffled after he got fired from Chargers after that great season, etc.. but this, man it's hard to watch a great football mind(any mind in general) go through this.