Two weeks ago, Kyrie Irving underwent a "minimally invasive procedure" to heal his left knee, which has bugged him for years.

#NEBHInjuryReport Kyrie Irving will undergo a minimally invasive procedure tomorrow to alleviate irritation in his left knee. https://t.co/UZNZDS4S0n

— Boston Celtics (@celtics) March 23, 2018

Kyrie was expected to miss a few weeks of action, but it was widely speculated that if Boston could get out of the first round, he would be able to play in the playoffs. That will not be the case. ESPN's Adrian Wojnarowski first reported Kyrie will miss the remainder of the 2017-18 season—including the playoffs. The Celtics later confirmed the news.

In the aftermath of left knee surgery, Boston Celtics All-Star guard Kyrie Irving will miss the rest of the regular season and playoffs, league sources told ESPN.

— Adrian Wojnarowski (@wojespn) April 5, 2018

The Celtics have been depleted by injuries all season. Gordon Hayward suffered a broken leg in the first game of the season. Marcus Smart is also currently sidelined. Bench forward Daniel Theis is out for the season. Marcus Morris and Al Horford have dealt with their own injuries.

Somehow, despite Boston's banged-up roster, the Celtics have still managed to piece together a tremendous season. Boston holds the East's No. 2 seed and, until the Celtics dropped their last two games, they had a real shot at the No. 1 seed.

Brad Stevens has done a masterful coaching job, and he's in the running—perhaps at the front of the running—for NBA Coach of the Year. As for whom they'll play in the first round? That's anyone's guess. The standings are still very much up in the air.