[3] After moving to South Florida, she swam with the Coral Gables Swimming Association, where at 12 she broke a National age group record in the 100-meter butterfly with a 1:30.0 at Oak Ridge Tennessee, in August, 1958.[6] Aware that the top swimming programs were in California, Sharon's mother Carolyn moved her and her five siblings to Los Angeles in January 1962.Sharon began swimming for the Los Angeles Athletic Club (LAAC) under Hall of Fame Head Coach Peter Daland.[9][10] In February 1964, likely anticipating Olympic competition that summer, she represented the Santa Clara Swim Club, and broke the American record in the 400-yard individual medley with a 4:47.1.Finneran received a silver medal for her second-place finish in the women's 400-meter individual medley – completing an all-American sweep of the event with Donna de Varona and Martha Randall.[16] She worked as a Dental Hygienist after college, and by 1980 was a permanent resident of Santa Clara, where she would stay busy taking care of her family of five children with husband Bob Rittenhouse, a commercial insurance broker.[5] Recognizing her world records in diverse events, and her 1964 Olympic silver medal, in 1981 she was inducted into the International Swimming Hall of Fame.
Coach Peter Daland '64
(l to r) M. Randall, D. de Varona, S. Finneran at 1964 Olympic Trials