Doc Rivers Kevin Garnett and Paul Pierce are all gone and so too it appears is the national interest they brought the Celtics. That blunt fact revealed itself in full when the team’s 2013-14 regular-season schedule was released Tuesday an event without the hype that it commanded in prior years. For the first time since 2007-08 season the Celtics won’t play on Christmas Day when the NBA showcases its headliners in heavyweight matchups. And for the first time since the season before that the Celtics won’t play in a game broadcast on TNT. In fact the Celtics have just three games slated for ESPN three for NBA TV. Aside from that Celtics games can be viewed on Comcast SportsNet New England NBA League Pass . . . or in person. If there are games that Celtics fans and others have circled on their schedule they are the “reunions” — when Rivers Garnett and Pierce face the Celtics either at home or on the road. Garnett and Pierce the two Celtics icons who were traded to Brooklyn in a blockbuster swap this summer face their former team for the first time in the regular season Dec. 10 in Brooklyn. The next night Rivers who left the Celtics after nine seasons to join the Los Angeles Clippers this summer returns to TD Garden when the Clippers visit the Celtics. How’s that for an emotional back-to-back? And in what should be the most emotional game of the season Pierce and Garnett make their first regular-season return to TD Garden Jan. 26 in a 6:30 p.m. ESPN nationally televised game. More matchups between these teams: Jan. 8 when the Celtics visit the Clippers; March 7 when the Nets return to Boston; and March 21 when the Celtics play the Nets in Brooklyn. The Celtics’ other two ESPN games: Dec. 6 vs. Denver and Feb. 21 at the Los Angeles Lakers. Their two NBA TV games: Dec. 16 against Minnesota Feb. 9 vs. Dallas March 9 vs. Detroit.