College
Played in 10 games as a reserve defensive end at Texas A&M in 2003, making 43 tackles (22 solos) with a sack and seven stops for losses. Montgomery moved into the starting lineup as a senior, recording 78 tackles (25 solos) with five sacks, eight stops behind the line of scrimmage and an interception. In 22 games with the Aggies, he registered 121 tackles (47 solos), six sacks for minus-23 yards and 15 stops for losses of 56 yards. He returned an interception 14 yards, deflected two passes and had five quarterback pressures. He also recovered two fumbles and caused another.
An all-conference and All-America defensive lineman at Navarro Junior College. He recorded 56 tackles and five sacks in 2002 and posted 75 stops and a sack his freshman campaign.

High School
Earned all-district and all-state honors, and was named a Tri-Defensive Player of the Year in the district as a senior at Center (Tenaha, Texas) High School … Posted 112 tackles as a senior and made three quarterback sacks … Registered 97 stops and 10 sacks as a junior … Coached by Paul Essary … Earned all-district and all-region honors in basketball.