Celtics television analyst Brian Scalabrine also has a daily three-hour show on Sirius XM NBA radio, and he said his discussions often involve trade rumors.

“I talk about trades all day,’’ Scalabrine said. “DeMarcus Cousins to the Clippers, the Lakers, whatever. Every day. You [try to] fill 15 hours without talking about trades.’’

On Monday, Scalabrine talked about a possible trade he said he’d heard of that involved the Warriors’ All-Star shooting guard, Klay Thompson, being sent to the Celtics in a massive three-way deal. The Celtics would send Avery Bradley and Jae Crowder to the Warriors and one of the Brooklyn Nets’ first-round picks that they own to the 76ers, and the 76ers would trade Nerlens Noel to Golden State.

Later Monday, though, Scalabrine said he had simply read about the rumor on an obscure website called “The Morning Ledger.’’ That rumor, which actually included Amir Johnson instead of Crowder, was not based on any facts, and had actually originated on a site called, Sportsrageous, which had taken the rumor from a message board post.

Before that revelation, though, Scalabrine’s position covering the Celtics and the fact he spent a season as an assistant coach in Golden State gave his words some weight. And, unsurprisingly, they caught like wildfire, to the point where he started a group text message chain with Celtics president of basketball operations Danny Ainge and Warriors general manager Bob Myers.

On Wednesday night, Scalabrine read the Globe the text he sent to Myers and Ainge.

“Hey guys wanted to clarify with you two,’’ the message read. “Read about trade rumors three days ago. People assume that because I talk to you guys and our relationship [that there is validity]. I just talked about the trade from a basketball standpoint. Sorry that I created this situation for both of you guys. I talk about rumors every day. This one seemed to catch fire for obvious reasons.’’

Scalabrine said the three-way text went on for a while. He has a good relationship with both Myers and Ainge.

“Were they mad? Well, anytime you have two GMs on a text, they’re going to destroy me,’’ Scalabrine said, smiling. “They absolutely destroyed me. Are they mad at me? I’m not sure. They could either be completely fun and sarcastic or they could be completely upset at me. I’m not sure yet.’’

Scalabrine said he thought the discussion about the Thompson trade went viral in part because it could make sense for all teams involved.

“Like, Klay Thompson would play better here than he would in Golden State; I truly believe that,’’ Scalabrine said. “And I think Avery Bradley and Jae Crowder could be perfect for trying to beat Cleveland and LeBron and how well they’re playing right now. And I think Golden State needs rim protection. Those are all things that are true. And I think Philly would love to have Brooklyn’s pick.’’

Scalabrine said this situation would not stop him from discussing trade rumors — or trade suggestions — on his radio show in the future.

“I talk about rumors every single day for three hours a day for five days a week from 7-10 every morning,’’ he said, “and you had that one in particular that blows up to this? I just find it shocking.’’

Horford progressing

Celtics forward Al Horford remained sidelined against the Mavericks Wednesday, as he missed his eighth game in a row because of a concussion. Coach Brad Stevens said Horford had a “great workout’’ on Wednesday, but it remains uncertain if he will play Friday. Stevens said that Crowder, who is sidelined with a sprained left ankle, also had a great workout on Wednesday and he was expected to practice on Thursday for the first time since suffering the injury.

Mavericks forward Dirk Nowitzki (Achilles’) missed his fifth consecutive game. Coach Rick Carlisle said Nowitzi’s return could come soon.

“Getting a guy like him back is always a positive,’’ Carlisle said. “It feels like he’s getting close. I don’t know if Friday is gonna be the day or not, but we’re getting closer.’’

Adam Himmelsbach can be reached at adam.himmelsbach@globe.com. Follow him on Twitter @adamhimmelsbach.