The Celtics and Brooklyn Nets will face off in a pair of preseason games this fall, including an Oct. The Celtics and Nets are also scheduled to face each other Oct. Given that their much-anticipated return is expected to be one of the most emotional moments in recent Celtics history, there's a realistic chance that Garnett and Pierce, and perhaps even Terry, who were all dealt to the Nets in a blockbuster trade in July, could miss the trip and wait until the regular season to play their first game at TD Garden as Nets. However, it's equally possible that Garnett and Pierce, two Celtics icons who helped deliver the team's first title in 22 years and whose numbers will almost certainly be retired by the Celtics one day, would like to get the emotional return out of the way sooner rather than later. 23 preseason game, part of a seven-game exhibition schedule they announced Thursday. The teams also play Oct. Paul Pierce and Kevin Garnett could be back in Boston even before the NBA regular season starts.