Miller was born in Los Angeles, California and grew up in Fontana, located in neighboring San Bernardino County.
He received third-team All-state, All-CIF Southern Section and Sunkist League Offensive MVP honors.
As a true freshman, he appeared in 10 games and was the backup behind running back Dwayne Wright, tallying 288 rushing yards (second on the team) on 54 carries with 2 touchdowns.
As a sophomore, he started 8 out of 10 games and was third on the team behind true freshman Ryan Mathews, with 624 yards on 132 carries and scored 7 touchdowns.
As a senior, he remained a backup and his production dropped as Mathews led the nation in rushing with an average of 150.67 yards per contest in 12 games.
[2] Miller was signed as an undrafted free agent by the Dallas Cowboys after the 2010 NFL draft on April 30.
[6] In 2011, he was passed on the depth chart by running back Phillip Tanner and was released on September 3.