The team announced Wednesday that it has signed the 6-foot-3 guard, who was suspended for the first 10 games of the 2010-11 season after pleading guilty to weapons charges in Maryland.
West played his first three seasons with Boston before being traded to Seattle in 2007 in the deal that brought Ray Allen to the Celtics.
Maryland authorities said he was carrying two loaded handguns, a loaded shotgun and an 8 1/2-inch Bowie knife while speeding on a three-wheel motorcycle on the Capital Beltway last September. He was sentenced to home detention but may travel to games.
West has averaged 10 points and 3.7 assists over his career. He was waived last month by the Minnesota Timberwolves, who had acquired him only a week earlier in a trade with Cleveland.