| Image:Sean Williams.jpg|
|Drafted By:||New Jersey|
Sean Williams (born September 13, 1986 in Arlington, Texas) was signed as a free agent, by the Dallas Mavericks, on December 21, 2011.
Williams, who attended Boston College, was named to the Big East All-Rookie Team as a sophomore. His second season with BC, he appeared in 27 games leading or tying the Eagles in blocked shots in 21 of those contests. The next season Williams played in 15 games, starting each, and had his best collegiate game as he posted a triple-double against Duquense with 19 points, 10 rebounds and 13 blocked shots.
The New Jersey Nets drafted Williams in the first round (17th overall) of the 2007 BA Draft. In his rookie season, he saw action in 73 games averaging 5.6 points and 4.4 rebounds. Making an immediate impact in his first NBA start (against Miami on 11/17/07), he scored 22 points, had 8 rebounds and 2 blocked shots. Invited to play in the Rookie-Sophomore Challenge at NBA All-Star Weekend in New Orleans, Williams tallied 17 points and 10 boards.
For the season, he led the Nets in blocked shots 34 times and, with 106 blocks on the year, registered the second highest block total for a Nets rookie in team history (trailing only Kenyon Martin's 113 blocks during the 2000-2001 season. He also led all NBA rookes with blocks per game at 1.45.
Williams split his second season between the Nets and Colorado of the NBA D-League. For the year, with New Jersey, he appeared in 33 games averaging 2.4 points and 2.4 rebounds. His third season was much the same being split between New Jersey and the D-League.
The Nets waived Williams on January 11, 2010 at which point he joined the Mavericks D-League affiliate, the Texas Legends. Playing for head coach Nancy Lieberman, he saw action in 49 games and averaged 14.4 points, 9.4 rebounds and 2.9 blocks per game. He was named to the D-League All-Star Game in Los Angeles and finished second in Defensive Player of the Year voting.
He made the Dallas Mavericks roster coming out of training camp in 2010 and appeared in 3 games averaging 4.7 points and 2.0 rebounds in 5.7 minutes of action. On January 6, 2011, he, along with the newly signed Yi Jianlian, were assigned to the Texas Legends of the D-League.
Williams was released by the Mavericks on March 22, 2012. During his tenure with Dallas, he he appeared in eight games averaging 3.6 points, 1.6 rebounds and 8.1 minutes.