Summer won 3 gold medals at the 1990 Goodwill Games before she began attending Stanford University. At Stanford, she compiled six individual NCAA titles and four relay championships. She also earned back-to-back NCAA Swimmer of the Year awards and led Stanford to a national championship in 1992.
At the 1992 Barcelona Olympics she won 2 gold medals, a silver medal and a bronze medal.
Summer also hosted the popular television series NBA Inside Stuff with Ahmad Rashad and Figure It Out.