By Gary Washburn, Globe staff

It turns out that the Jeff Green injury situation was quite serious and the team revealed this morning that he will miss the season to have surgery to repair aortic aneurysm, which was detected during his Dec. 9 physical.

Green was examined by a series of cardiologists who suggested surgery. The Celtics said he should be able to resume his career next season.

Green reached out on Twitter after the announcement.

"Thank you everyone for your thoughts and prayers... much appreciated love you all..and I'll be back soon stronger and better than ever I promise," he wrote.

“While we are saddened that Jeff will not be able to play this season, the most important thing is his health, and we were fortunate to have access to an amazing team of specialists to evaluate Jeff’s case,” Celtics president of basketball operations Danny Ainge said in a statement. “The entire Celtics family supports Jeff during this difficult time in his career.”

Green was expected to serve as the primary reserve small forward and give the Celtics some youth, athleticism and size in this compacted season. He signed a one-year, $8 million contract last week and it is uncertain whether the club would receive a roster exception to add another player of that salary.

It is also uncertain whether Green's contract will be voided.

Celtics coach Doc Rivers appeared grim after Friday's scrimmage at TD Garden and said the team had planned for Green to miss extensive time. He said for now Marquis Daniels and Sasha Pavlovic will serve as the backup to Paul Pierce.