Regardless of whether Leandro Barbosa's left knee injury ends his season, the Boston Celtics find themselves once again having to deal with adversity.

A slow start led to cat calls for Danny Ainge to "blow" the team up, whatever that means.

A six-game winning streak quieted things momentarily, only to be followed by a six game losing skid.

Rajon Rondo went down for the season with a torn right ACL injury that was diagnosed on Jan. 27. Just three days later, Jared Sullinger had back surgery and he too was lost for the season.

Boston ran off seven straight wins, so all was good ... until Monday's 94-91 loss to Charlotte which saw the end of their streak and yet another Celtic player go down.

Leandro Barbosa was driving to the basket while being defended by Gerald Henderson. He made a pivot move, passed the ball back to the top of the key and began limping.

Moments later, he was on the floor in serious pain.

The Celtics say he has a left knee injury and will have an MRI this morning. Until then they won't officially know his status, but there are strong indications that he won't be back on the floor this season.

And so once again the Celtics will likely have to manage to get by with a roster that continues to get more and more depleted by the day.

"It comes with playing hard, and injuries happen in this league," said Boston's Jeff Green. "Guys have to step up and continue to come together as a team."

It seemed relatively easy for this group to figure out what to do when Rondo went down. As Boston's primary ball-handler, simply spreading the ball-handling duties around did the trick.