In 2006, he started 12 of 13 games and earned honorable mention All-Big 12 after making 36 tackles (8.5 for losses and 4.5 sacks, two pass break-ups and one forced fumble.

He ran the 40 yd (37 m) dash in 4.78 seconds, measured a 28 in (710 mm) vertical jump, and completed 13 repetitions on the 225-pound (102 kg) bench press.

[3] Jackson was promoted to the active 53-man roster on December 20, 2010, due to Brian Orakpo suffering a groin injury.

In Week 17 against the Philadelphia Eagles, Jackson subbed in for Orakpo in the second half of the game after the latter injured his shoulder after sacking Michael Vick.

[9] This turnover would lead to the Redskins scoring a field goal helping to tie the game and eventually winning in overtime.

[10] Two weeks later, he secured his fourth interception of the year against the Dallas Cowboys in a win that won the team the title of NFC East Champion.

[11] Set to be a restricted free agent in the 2013 season, Jackson agreed to re-sign with the Redskins on a one-year deal on March 9, 2013.

[12][13] On March 20, it was announced that Jackson would be suspended for the first four games of the season due to violating the league's substance abuse policy.