After a long and illustrious career in the Randolph Little League, the Hamelin family moved from their home in Randolph, New Jersey, to Irvine, California, when Bob Hamelin was 12 years old. Hamelin attended Irvine High School where he excelled in both football and baseball and was named the School"s Athlete of the Year as a senior. The University of Notre Dame recruited him to play football, however Hamelin had already decided to pursue a career in baseball.
Hamelin enrolled in Santa Ana College after graduating from high school and played on the school"s baseball team
Soon thereafter the young baseball prospect transferred to University of California, Los Angeles, where he continued to play baseball for his new school.