Miller was born in Los Angeles, California and grew up in Fontana, located in neighboring San Bernardino County. He graduated from Henry J. Kaiser High School of Fontana in 2006. As a senior, he rushed for 2,567 yards on 277 carries, had a 9.27-yard per carry average and scored 34 touchdowns. He rushed for more than 100 yards in every game and had seven contests of 200 or more yards. He had 277 rushing yards and four touchdowns against Coachella Valley High School. He also played defensive back, registering 19 tackles and 2 interceptions. He received third-team All-state, All-CIF Southern Section and Sunkist League Offensive MVP honors. He competed in track & field as a sprinter, recording personal-best times of 10.7 seconds in the 100 metersand 21.9 seconds in the 200 meters.
College career
Miller accepted a football scholarship from Fresno State University. As a true freshman, he appeared in 10 games and was the backup behind running back Dwayne Wright, tallying 288 rushing yards on 54 carries with 2 touchdowns. He led the team with 16 carries for 113 yards and a touchdown against Hawaii. 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 junior, even though Mathews missed time with a knee injury, Miller was also limited with injuries and missed the game against Louisiana Tech University. Anthony Harding ended up taking over as the rushing leader of the team. Miller rushed for 844 yards on 120 carries and scored 7 touchdowns. Among his highlights were 161 rushing yards with two touchdowns against Hawaii and 181 rushing yards, including an 80-yard touchdown against Idaho. 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. Miller also fell behind freshman Robbie Rouse, posting 367 rushing yards on 68 carries, with 9 receptions for 38 yards. He finished his college career with 45 games, 2,062 rushing yards on 374 carries and 20 touchdowns in his four seasons. He also made 14 receptions for 91 yards.
On December 7, 2011, he was signed by the Oakland Raiders to their practice squad. He was released on August 31, 2012.
Seattle Seahawks
On September 27, 2012, he was signed by the Seattle Seahawks to the practice squad. He was cut on October 2.
Baltimore Ravens
On December 18, 2012, he was signed by the Baltimore Ravens to the practice squad. He was considered part of the roster when the team won Super Bowl XLVII. He was released on May 3, 2013.
