Richardson attended Los Alamitos in Los Alamitos, California, where he was an All-Region selection. As a senior, he made 38 tackles and five interceptions on defense and 31 receptions for 540 yards and five touchdowns on offense.
Considered a three-star recruit by Rivals.com, he was rated as the 30th best cornerback prospect of his class.
He was drafted by the Pittsburgh Steelers in the fifth round of the 2014 NFL Draft. He played college football at Arizona. Prior to playing there, he chose to attend the University of Arizona from 2010 to 2013.
In 2010, he played in all 13 games as a true freshman, starting three.
In his first career start against Washington State, he intercepted two passes. He finished the season with 29 tackles, seven pass break-ups, one forced fumble and two picks.
In 2011, he played in and started 10 games, recording 47 tackles, a team leading four interceptions (73 yards), five pass break-ups and one forced fumble. In 2012, he played in all 13 games with 11 starts.
He recorded 58 total tackles, one interception and 14 pass break-ups.
In 2013, he started all 13 games, recording 55 tackles, including three for loss, three interceptions and four pass break-ups. Pittsburgh Steelers Richardson was drafted by the Pittsburgh Steelers in the fifth round (157th overall) of the 2014 NFL Draft. He was cut from the Steelers 53-man roster prior to the start of the regular season but was then signed to their practice squad.
Kansas City Chiefs On February 26, 2015, Richardson signed a one-year deal with the Kansas City Chiefs.
He was waived by the Chiefs on April 21. Arizona Carindals On July 31, 2015, Richardson was signed by the Arizona Cardinals.
On August 31, 2015, he was cut by the Cardinals. Tennessee Titans On November 17, 2015, Richardson was signed to the Titans" practice squad.
