[2][6][7] There, he played primarily center field, along with a little first base, for the Gauchos baseball team for three years and won All-Big West Conference honors in 1969 and 1970.
[8][1][9] During the 1971–1972 seasons Gamboa was an outfielder for and manager of Stratford (Ontario) in the Canadian Baseball League, where he was a two-time All-Star.
[8][1] In 1985 he managed the Stockton Ports in the Class A California League to a North Division-leading .566 won-loss percentage, and the Division championship.
[1][11] In 2000, he managed the Dodgers' Albuquerque Dukes of the AAA Pacific Coast League to a Central Division-leading .597 won-lost percentage and title.
[1][11][16][17] While he was the Royals first base coach, he was attacked on the field at Comiskey Park by two fans during a game against the Chicago White Sox on September 19, 2002.
[20] In an interview, he said he was serving as a Coach, due to his longtime friendship with manager Jerry Weinstein, and his knowledge of MCU Park (where the Qualifier was being played) even though he wasn't Jewish.
He continued in a similar role for Team Israel at the 2017 World Baseball Classic main tournament in South Korea and Japan.
[20] In 2010, he managed the Palm Springs Power of the Southern California Collegiate Baseball League to a 34–4 mark, the best in team history.