After his final year in college, Williams was automatically eligible for the
2006 NBA draft, and during the
NBA Draft Combine he was measured at 6 ft 7.25 in without shoes, 6 ft 8.75 with shoes with a 7 ft 4.25 in
wingspan and a weight of 285 lbs. He was not drafted by an NBA franchise, but he was drafted by the
Yakima SunKings in the 6th round of the 2006
CBA Draft (61st overall). He joined the
New Jersey Nets for the 2006
Orlando Summer League, playing in five games (2 starts) averaging 10.2 points and 5.6 rebounds in 17.3 minutes per game during the event. He did not make the Nets roster for the
2006–07 NBA season, and signed for Italian team
Pallacanestro Cantù. In his first season in
Serie A, he played 37 games, averaging 9.9 points and 5.7 rebounds in 18.9 minutes, shooting .633 from the field. In 2007 he took part in the
Las Vegas Summer League with the
Phoenix Suns, playing 4 games with averages of 1.8 points and 2.8 rebounds in 9 minutes. In July 2007 he signed for another Italian team, Avellino, where he averaged 12.8 points and 8.1 rebounds in his first season, and 8.0 points and 4.7 rebounds in his second season. In 2008 he won the
Italian Basketball Cup, and the following season he participated in the
2008–09 Euroleague, playing all 10 games and posting averages of 9.9 points and 5.1 rebounds. In 2009 he left Avellino for Libertas Pesaro, another team in the Italian top level, and he played one season there averaging a career-best 14.2 points and 8.1 rebounds in 26.7 minutes per game: with Pesaro he took part in the
2009–10 FIBA EuroChallenge, finishing in fourth place. He played 15 games in the competition, posting averages of 11.9 points and 5.7 rebounds. In the summer of 2010 Williams obtained a
Bulgarian passport, and became a Bulgarian national in October, after coming back from a training camp with the
Portland Trail Blazers. The Bulgarian passport made him an
EU citizen, thus making easier for him to sign for European clubs. In 2010 he signed for another Italian team, JuveCaserta, where he played in Serie A and in the
2010–11 Eurocup Basketball. Williams had a successful season with Astana, where he won both the national cup and the league title, was named "best center" in both competitions, and won the Kazakhstan player of the year award. In 16 games in Kazakhstan he averaged 13.1 points and 6.1 rebounds. but only stayed there for 6 months, being released in the last days of December 2012. He then joined
Chinese team Guangzhou Liu Sui, which played in the
National Basketball League, and averaged 14.8 points, 7.4 rebounds and 1.1 steals in 9 appearances. averaging 2.6 points and 2.1 rebounds in limited playing time. He signed for Cantù again in July 2014, and played a total of 35 games with the team, averaging 7.9 points and 4.7 rebounds in 20.8 minutes per game. He also had the chance to compete again at continental level, taking part in the
2014–15 Eurocup. He then joined Polish team MKS Dąbrowa Górnicza and played the entire 2015–16 season there, posting averages of 10.5 points and 5.1 rebounds per game. In 2016 he moved to Switzerland, signing for the Lugano Tigers. In 2017 he transferred to Uruguayan club Hebraica Macabi to play in the
2017 Liga Sudamericana de Básquetbol. ==References==