Celtics guard Williams arrested near Seattle

Kent (Wash.) police say Boston Celtics guard Terrence Williams was arrested Sunday and accused of brandishing a gun at the mother of his 10-year-old son during a visitation exchange.

Williams was booked into the King County Jail in Seattle early Monday for investigation of an assault charge, with a court appearance expected later in the day. Det. Melanie Frasier says the woman called police about 1 p.m. Sunday and said she had been threatened with a gun. Williams had left the scene but was later arrested. No one was injured.

Police are withholding other details while the case is under investigation. Kent is located about 20 miles south of Williams' native Seattle.

The 25-year-old Williams signed a 10-day contract with the Celtics in late February, then later agreed to a multiyear contract. He appeared in 24 regular-season games, averaging 4.6 points, 1.8 rebounds, and 1.6 assists over 13.3 minutes per contest.

Williams, the 11th overall pick of the Brooklyn Nets in the 2009 draft, has played for four teams in four NBA seasons and admitted that his own immaturity played a role in his trouble to stick with a team. He played for the Guangdong Southern Tigers of the Chinese Basketball Association at the start of the 2012-13 season before joining Boston upon returning stateside.

The 6-foot-6, 220-pound Williams found a role as a backup point guard with the Celtics and appeared in five of the team’s six postseason games against the Knicks, logging a playoff-high 17 minutes in a Game 5 victory in New York.

Williams is schedule to earn $948,000 if he makes the Celtics’ roster next season. His contract is initially fully nonguaranteed, but has checkpoints that unlock portions of his salary. The Celtics have until June 30th before $200,000 of Williams’ contract becomes guaranteed (jumping to $300,000 on Sept. 1, and becoming fully guaranteed on Oct. 31 near the start of the 2013-14 season).

Information from The Associated Press and ESPN Boston's Chris Forsberg was used in this report.