Eugene Noble "Buck" Mayer was an American football player. He played college football at the halfback position for the University of Virginia Cavaliers football team from 1912 to 1915. In 1915, he became the first football player from a Southern school to be recognized as a consensus first-team All-American. Mayer died during World War I while serving in the United States Army. He was posthumously inducted into the Virginia Sports Hall of Fame in 1980.

The 1915 College Football All-Southern Team consists of American football players selected to the College Football All-Southern Teams selected by various organizations in 1915. Josh Cody and Baby Taylor were selected third-team All-Americans by Walter Camp, and Bully Van de Graaff was selected for his second-team. Van de Graaff was Alabama's first ever All-American. Buck Mayer of the 8–1 Virginia Cavaliers was the south's first consensus All-American, selected first-team All-American by Frank G. Menke and Parke H. Davis. The "point-a-minute" Vanderbilt Commodores won the SIAA.