I am so sad to belatedly hear this news. Mike Phelps is one of the greatest men - not coaches, not educators - I have ever had the privilege of knowing.
As my HS algebra teacher at St. Joseph's HS Alameda, he was knowledgeable, patient, and had multiple ways to explain a problem to any student in his classes. I stunk at algebra, but to this day,I can help my son solve any algebra problem thanks to what I learned from Mike Phelps.
As a basketball coach, I have to this day never seen ANY better at ANY level of the sport, maximizing the ability of a very small talent pool at a very small school to win as a team against opponents with superior numbers and talent.
I was never on the team, but in gym class, he gave aspiring basketball players the same level of attention to advancing their knowledge of the game and maximizing their skills and ability to compete, as he did to his team players. I still remember him excitedly congratulating me in gym class for getting in position to draw a charge and perfectly executing the weight transfer to the heels he taught us to fall backwards and draw the referee's attention to the charge call. I was never going to be on a team to use that skill in front of a referee, but he taught it so well that even I could do it, and he recognized me for doing it right.
I transferred from St. Joe's in 1976, but watched in wonder as my former school's basketball coach assigned a 6'2" center, Paul Fox, to front a 6'7" "All Everything," Haaken Austerfjord, of Monta Vista HS, and then a 6'11" future NBA player, Mark McNamara, of Del Mar, and completely shut both of them down (with back side help, of course) in what everyone in the local press touted as a miraculous and surprising advance to the TOC Finals at the Oakland Coliseum. This was Chaminade beating Virginia and Ralph Sampson before that actually had happened. But it was no surprise to those St. Joe's players, or to anyone who knew Coach Phelps. His teams were always prepared to the max, and they always believed, if they executed their plan, they could beat anyone.
When I returned to the Bay Area, years after leaving HS and after graduating from the Naval Academy and starting a Navy career, he remembered me - just a student, not one of his players - and greeted me kindly and warmly. I am very sad and very sorry no more students will be learning algebra, basketball,or baseball from Mike Phelps. I am saddened my 15 year old son will never get to meet him or learn a basketball or baseball coaching nuance from him. It would have been an absolute honor for him to do so. God bless you and welcome you Coach Mike.