An 11-year veteran who has played for eight teams, Moore averaged 3.5 points and 3.3 rebounds in 16.2 minutes a game for Sacramento. Still, several playoff-contending teams were interested in signing him, including Denver, Dallas and New Orleans.
"It was a tough decision for Mikki," his agent, Mark Bartelstein, said, "but he's known [Celtics coach] Doc Rivers for a long time and they have a good relationship. And at the end of the day, they're the defending champs and they have a heck of an opportunity to get back to the Finals."
Moore played three games for Boston during the 2002-03 season.
Chris Broussard is a senior writer for ESPN The Magazine.