The 6'0" 175 lb. Ellis is a native of Garden Grove, California and is currently a sophomore at Cal Poly San Luis Obispo. A 2011 graduate of Pacifica High School in Garden Grove, Ellis hit .300 as a senior with eight doubles, three triples and three home runs with a .388 on-base percentage and .556 slugging percentage. He also drove in 21 runs and helped the Mariners to 24-8 overall record and second-place finish in Empire League. In his freshman season at Cal Poly, Ellis saw limited action in just 18 games, going 3 for 15 (all doubles) while scoring a pair of runs and notching three RBIs.