Through three quarters of Tuesday night's game against the Nets, the Celtics were up 84-67 and on their way to an easy win. And then disaster struck. 

Caris LeVert turned into Michael Jordan, single-handedly outscoring the C's the rest of the way. Boston gave up 51 points in the fourth quarter alone, the second-highest scoring quarter by any opponent in franchise history.

After the Celtics' 129-120 overtime loss, Brian Scalabrine asked whether it was the worst loss of the Brad Stevens era. It's a great question and we ought to answer it. Let's try. 

So it doesn't get No. 1, but it's brutal.

On paper it seemed like an impossible game to lose at home against a Nets team missing its stars, but then again, it was a perfect storm.

No Jayson Tatum, Kemba Walker on a minutes restriction, Gordon Hayward and Jaylen Brown leave the game with injuries. At that point you're one Marcus Smart meltdown away from actually losing a game in which you led by 21. 

• Blakely: Plenty of blame to go around after C's loss

[Frank Costanza voice]

HOW DOES A TEAM WITH JAYLEN BROWN AND JAYSON TATUM EMERGING AS STARS ONLY SCORE 79 POINTS AT HOME AGAINST A TEAM WHOSE SECOND-BEST PLAYER IS JEFF GREEN?!
 

Never forget that the Celtics had to trade Aron Baynes in order to have money for a max free agent this past summer.

For all the time we've spent saying the Celtics could use another big, imagine having Baynes, who's posting career highs in points and rebounds in his first season in Phoenix. 
 

This is the most lopsided ass-kicking on this list.

Down one game to none with the opportunity to tie the Eastern Conference Finals at home, the Celtics spotted the Cavs an NBA record 41-point lead at halftime.

From there, the Celtics opted to rest Isaiah Thomas, who was dealing with a hip issue. A tell-tale sign of a game being terrible is when you don't even bother playing your best player in the second half because you're losing so badly.

Final score: 130-86.
 

It's a terrible shame that there was a lockout that cost the entire NBA the 2018-19 season.

The Celtics did not play and Toronto still has no titles outside of baseball since 1967. Very sad.