Aaron "Spike" Davis played Defensive End for the Southern Methodist University Mustangs (SMU) Div-I football team. Originally joining as a walk-on, Davis eventually earned a scholarship. After graduation, Davis was involved in mini camps for the Green Bay Packers and Washington Redskins.
Davis decided to forgo a career in professional football and instead looked to rugby by joining Tiger Rugby, a member of the USA Rugby National Development Academy program. Davis was called in to train with both the Men's Eagles Sevens during the 2015-16 season, and then with the Men's Eagles prior to the 2016 Americas Rugby Championship.
In 2016, Davis signed with the Ohio Aviators of PRO Rugby North America and was the league's top try scorer, playing Wing. Later in 2016, Davis signed with the Tasman Griffins in New Zealand.