In 2012, he led the league in interceptions with 14, and was named the Defensive Back of the Year, as well as earning First-team All-Arena.

[1] After re-signing with the Soul for 2013, he was placed on other league exempt list due to his signing of a futures contract with the Cleveland Browns.

[1] After his release from the Browns, the Soul traded Richardson to the Jacksonville Sharks for Jeff Hughley.

On April 15, 2014, Richardson signed with the Toronto Argonauts of the Canadian Football League.

On August 26, 2017, the Soul beat the Tampa Bay Storm in ArenaBowl XXX by a score of 44–40.