Mayes averaged 17 points and 12 rebounds per game as a Paladin. He was named South Carolina Player of the year in 1975. As a senior, Mays earned first team honors from Basketball Weekly and Citizens Foundation. He earned second team honors from Sporting News and Converse and third team honors from the Associated Press.
After Mayes college career ended, he was selected by the Milwaukee Bucks basketball team in the second round of the 1975 draft. After two season in the NBA, his international career would take him to Italy, France and Spain.