Before taking up rugby on a full-time professional basis, Davis played American football.
He started as a walk-on football player at SMU but earned a scholarship.
[3] At SMU, he bulked up from 215 to 290 pounds, and played defensive line and special teams.
[4] In the inaugural 2016 PRO Rugby season, Davis led the league in tries with 14, five more than the next closest player's tally.
[5] In August 2017 it was announced that Spike Davis had failed a urine drug screen in January 2017 and following a failed appeal had been issued a ban by World Rugby preventing him from playing rugby at any level for 4 years.