ステート・カレッジ・スパイクス
Gaffney played three years of college baseball as an outfielder at Stanford. During the three years he hit .300/.405/.427 with eight home runs. He was drafted by the Pittsburgh Pirates in the 24th round of the 2012 Major League Baseball Draft. He played in 38 games for the State College Spikes that year, hitting .297/.483/.441. After the season, he returned to football.