Boston Celtics general manager Danny Ainge was treated after suffering a mild heart attack in Milwaukee on Tuesday ... and luckily, he's expected to make a full recovery.
The Celtics released a statement on Thursday ... saying the ex-NBAer received immediate medical attention and will be able to return to Boston, although it's unclear if he will be able to attend tomorrow night's Game 3 matchup in the Eastern Conference semis against the Bucks.
Ainge has had health issues in the past -- he also suffered a mild heart attack in 2009.
The 60-year-old won 2 titles with the Celtics during his 14-year career before taking his talents to the front office. He's widely considered one of the best execs in the league ... and helped put together Boston's 2008 title-winning roster.