Mason's first coaching job was for the University of Kentucky in 1895 and posted a record of 4 wins and 5 losses. His next job was as the sixth head football coach
for the Colgate University Raiders located in the Village of Hamilton in Madison County, New York and he held that position for two seasons, from 1897 until 1898. His overall coaching record at Colgate was 7 wins, 7 losses, and 1 ties. This ranks him 15th at Colgate in terms of total wins and 21st at Colgate in terms of winning percentage.