BOSTON — Boston Celtics star Jayson Tatum’s belated birthday present to himself will be a return to the game that was abruptly taken away from him last season. Tatum started in the Celtics’ home matchup with the Dallas Mavericks on Friday, marking his season debut almost 10 months after having surgery to repair a ruptured right Achilles tendon. “It’s been a long journey. And the culmination of a new journey begins today,” Celtics coach Joe Mazzulla said during his pregame news conference. READ: NBA: Jayson Tatum listed on verge of return after Achilles injury JAYSON TATUM GETS ON THE BOARD […]... Keep on reading: NBA: Celtics' Jayson Tatum starts in season debut vs Mavericks