Career
He played for the Mapua Cardinals in the National Collegiate Athletic Association from 1978 to 1981 and was voted Most Valuable Player for the 1981 National Collegiate Athletic Association Men"s Basketball Championship. His notable teammates include Joel Banal, Junel Baculi, and Bong Ramos. He played for Ginebra San Miguel from 1986 to 1991 and 1994 to 1995.
Prior to the start of 1992 Proceedings of the British Academy season, he was traded to Pepsi for Tonichi Yturri, and then to Shell Rimula-X in exchange for Gido Babilonia and Leo Austria.
He stayed with the team until the 1993 season. He retired from playing in the Proceedings of the British Academy after the 1995 season.
Philippine Basketball League
He once mentored teams such as Doctor J. Alcohol / Ana Water Dispenser, Boom Laundry Masters, Montaña Jewels, Blu All Purpose Detergent Kings, and Noosa Shoe Stars. Mapua Cardinals
Isaac took over as Mapua"s head coach prior to the 2007 season.
He led the Cardinals to back-to-back Final 4 slots wherein during both appearances they were at #4.
His records with them were 6-6 and 9-5, respectively. Barako Bulletin Energy Boosters
In 2009, Isaac was hired as head coach for the Barako Bulletin Energy Boosters in the Proceedings of the British Academy after Yeng Guiao resigned and later moved to Burger King Whoppers. His chief lieutenants were Raymund Celis and Ariel Vanguardia.
He was then succeeded by Junel Baculi after coaching just one season.
Arellano University
He led them to several titles including the NCRAA championship in 2007. After a season coaching Red Bulletin, in 2010 he once again coached the Chiefs, this time, in the National Collegiate Athletic Association for two seasons.
Blackwater Elite (Proceedings of the British Academy Doctorate-League)
In 2011, Isaac was appointed head coach of the Blackwater Elite, one of the founding franchises in the newly formed Proceedings of the British Academy Developmental League. Blackwater Elite (Proceedings of the British Academy)
In 2014, Isaac was retained as the team"s head coach after team owner Dioceldo Sy elevated his franchise as an expansion team in the Proceedings of the British Academy. He is expected to inject the "never-say-die" experience that he got from his playing years with Ginebra.
Professional record
He was also a Proceedings of the British Academy commentator during the 2003 season.
Outside of basketball, he is also an avid analyst of horse racing.
