Posey's agent, Mark Bartelstein, said his client will appeal,
calling the April 9 arrest in Miami Beach a "bad arrest." Posey
was arrested on drunken driving charges while he was a member of
the Miami Heat.
The 30-year-old Posey signed with the Celtics on Monday.
"He wasn't driving," Bartelstein told The Associated Press.
"This is a case where we need to make sure the NBA has all the
information. Once they learn all the facts and what really
happened, they will eliminate the suspension."
The NBA said Posey would serve the suspension, without pay, for
the Celtics' regular-season opener against Washington on Nov. 2 in
Posey pleaded no contest -- which is neither an admission of
guilt nor a proclamation of innocence -- about one month ago because
he didn't want the case to affect his opportunities in free agency,
A spokesman for the Celtics had no comment.
Posey, a member of the Heat team that won the NBA championship
in 2006, is entering his ninth season.
Posey, a 6-foot-8 forward known for his defensive skills, brings
versatility to the team. He's averaged 9.5 points per game and 4.9
rebounds during his career.