Ellis racked up 214 rushing yards and 116 passing yards, while scoring four touchdowns at the quarterback position for head coach Dominic Damico at McDonogh School. He totaled 64 touchdowns, 6,521 total yards and completed 256 of 423 pass attempts in his career. This past summer, Ellis clocked a 4.47 in the 40-yard dash, earning him Fastest Man honors at The Opening Washington, D.C., regional. Before his senior season, Ellis played football at Bishop O’Connell and turned in 1,071 passing yards, eight touchdowns in seven games played his junior year in 2016. He also competed in track and field, earning all-conference accolades and owning the 100-meter dash and long jump records for the league.