There are actually two players in NBA history named Anthony Roberson:

Anthony Roberson (born 1983): This Roberson played point guard for the University of Florida and entered the 2005 NBA draft. He went undrafted but signed with the Memphis Grizzlies. He bounced around a bit, playing for the Grizzlies, Golden State Warriors, New York Knicks, and Chicago Bulls throughout his short NBA career. His most interesting fact might be that he scored his career-high 21 points against the San Antonio Spurs in December 2006.  After 2009, he is listed as a free agent, so it appears he is not currently playing in the NBA.

Anthony Roberson (born 1994): This younger Anthony Roberson played shooting guard for Central Oklahoma and went undrafted in the 2018 NBA draft. There's not as much information readily available about him online, but he is also listed as a free agent after his brief stint with the Oklahoma City Blue in 2018.