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-America team is composed of college football players who were selected as All-Americans for the 1915 college football season. The only selectors for the 1915 season who have been recognized as "official" by the National Collegiate Athletic Association (NCAA) are Walter Camp, whose selections were published in Collier's Weekly, and the International News Service (INS), a newswire founded by William Randolph Hearst.