Kevin Garnett's "Area 21" on TNT brought in some interesting guests Monday night: Glen "Big Baby" Davis, Kendrick Perkins, Paul Pierce and Rajon Rondo. As you can probably tell, those are all members of the 2008 title-winning Celtics with the notable exception of Ray Allen.

Allen upset his teammates when he left the team to join the Heat in 2012. The beef was recently revealed in an article on The Undefeated where members of the team admitted Allen wasn't invited to a reunion they were putting together to celebrate the 10-year anniversary of the championship.

With all these players together Monday night, fans wanted them to discuss Allen and why they were upset.

“It was more than basketball for us… It felt like a sour breakup.”



Pierce, KG, Rondo, Big Baby & Perk share their thoughts on Ray Allen. pic.twitter.com/8JYRWmxm0i — KG's Area 21 (@KGArea21) May 9, 2017

With Garnett acting as host, the players all took their turns to explain why they were mad at Allen.

"I thought we formed a brotherhood here in Boston," Pierce said. "Not only how we carried ourself on the court, but off the court. And I just figure if it was me leaving, or KG leaving, I would have been like, 'Rondo, Perk, Baby, this is what I've been thinking about.' That's what I was hurt about, when Ray didn't just at least give us a heads up about it."

Perkins made similar comments, as well as Davis, and Rondo decided to just observe and not say much.

The entire segment gained plenty of attention in the NBA world considering how candidly each player spoke about the issue.

MVPs of this segment...



1. Perk - just incredible

2. Pierce for rambling and wearing sunglasses indoors

3. Rondo refusing to speak https://t.co/muJq1QmDYy — Bill Simmons (@BillSimmons) May 9, 2017

One thing is clear about the whole thing, though. Unless Allen reaches out to them on his own terms, this feud will probably continue. The former Celtics teammates all felt like Allen is the one who needs to initiate conversation if he wants to fix the situation.

UPDATE: Allen appears to have responded to the talk from last night with a Facebook post Tuesday morning showing him pushing past Rondo in a Celtics uniform.