He was one of the top prospects of the high school class of 2001, being named North Carolina Mr. Basketball and a McDonald's All-American.

In the 2001 McDonald's game, which was played in Durham, North Carolina, he wore jersey number 45 (his usual 54 was taken by Kwame Brown) and he scored 10 points, shooting 4/10 from the field and 2/3 from the free throw line.

[8] He also played in another high school all-star game, the Capital Classic, where he scored 7 points (2/9 shooting, 3/4 on free throws).

[20] In 2002 coach Steve Robinson left the Seminoles and was replaced by Leonard Hamilton, who decided to give Richardson a starting role in the team.

As a result, Richardson saw his playing time increased to 29 minutes per game, and as a sophomore he recorded career-highs in all the major statistical categories with 12.4 points, 5.3 rebounds, 1.5 assists, 1.2 steals and 1.1 blocks.

He also recorded a new single game high with 20 points (including 10/10 from the foul line) along with 9 rebounds against Georgia Tech on January 14, 2003.

[21] His junior year saw him starting the first 16 games of the season, and on December 1, 2003, he recorded a new career-high with 27 points on 10/13 shooting (4/5 on free throws) against Northwestern.

Richardson decided to go back to the United States and was selected in the second round of the 2010 NBA Development League draft by the New Mexico Thunderbirds.

In 41 games in the top tier of Japanese basketball he recorded 10 points, 5.1 rebounds and 1.4 blocks per contest, playing 19.4 minutes.

From August 2018 to May 2021 Anthony was the Head Boy's Varsity Coach at Northland Christian School, leading the team through multiple seasons and fostering development of student-athletes.

In this role, he was responsible for defensive coordination and assisting long time head coach achieve school record breaking seasons.