Fischer attended Adolfo Camarillo High School, where was a two sport star also playing basketball. He discovered his ability to jump dunking a basketball in 8th grade. He played attacker on the Blue Thunder with best buddy Andrew. He was the CIF California State Meet champion in the high jump in 1994 after finishing 2nd and 5th the previous years. He also finished second at the National Scholastic Indoor Championships and eventually jumping 7' 4" at the Santa Barbara Easter Relays, which was the 2nd best (behind Maurice Crumby in 1983) for a Californian ever, eighth best nationwide. Later that season he won the US Junior Championship and represented the US at the World Junior Championships though not making the final. Fischer was inducted into the Mt. SAC Relays high school Hall of Fame in 2006.