He was a second-team All-Montview League selection as a junior after totalling 57 tackles, three sacks and one fumble recovery on defense and 20 pancake blocks on offense.

As a senior, he was credited with 86 tackles, eight sacks, two fumble recoveries and 34 pancake blocks, helping lead his team to a 10–3 record and to the third round of the CIF playoffs.

He was also named first-team All-State (Small Schools) by Cal-Hi Sports and was selected to the CIF-Southern Section Mid-Valley team.

In 2008, he was hampered by a sprained ankle early in the season but he made outstanding progress down the stretch and was the Offensive winner of UCLA's Captain Don Brown Memorial Award for Most Improved Player.

[2] Harris had his first-career start on ESPN's Monday Night Football against the Oakland Raiders when injuries kept incumbent starter Jared Gaither off the field during training camp.

[7] His biggest thrill in sports was catching a screen pass for a touchdown in his junior season at Duarte and lists former NFL star Jonathan Ogden as the player he admires the most.