From 1978 to 1984, Gaines set 10 world records. At the time, he was the world record holder in the 100-meter and 200-meter freestyles. The
1980 boycott prevented Gaines from competing at the
1980 Moscow Olympics. Gaines said the boycott came at a time when he considered himself at his peak, and that he believed he missed an opportunity for four gold medals. Gaines qualified for the
1984 Summer Olympics in Los Angeles, California. He won gold in the 100-meter freestyle and two gold medals for relays, swimming the anchor legs for the U.S. team in the 4×100-meter freestyle relay and 4×100-meter medley relay. Gaines said he experienced mental health issues after missing out on the 1980 Games and had "some real trouble post-Olympics, and...some big struggles, especially the year after." ==Commentating==