Antonio Brown said in an Instagram Live appearance that his former teammate James Harrison gave him CTE.

Harrison was apparently surprised to learn of the former Pittsburgh Steelers wide receiver’s claim.

James Harrison of the Pittsburgh Steelers walks onto the field before the start of a game against the Oakland Raiders at Heinz Field on November 8, 2015, in Pittsburgh.
(Justin K. Aller/Getty Images)

Harrison tweeted the infamous video of Idris Elba choking on a chicken wing on an episode of «Hot Ones,» saying he had received 150 text messages on Saturday morning.

«I realized why I got 150 text messages this morning,» Harrison wrote.

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Brown said Harrison gave him CTE and caused his «aggressive behavior.»

«I wanted to tell you that I think James Harrison gave me CTE. James Harrison had an illegal helmet for over 20 years in the NFL and he hit me once. And ever since he hit me I’ve been super aggressive. So blame James Harrison for my CTE,» Brown said.

Chronic traumatic encephalopathy (CTE) is a brain condition that researchers have determined is caused by repeated blows to the head or experiencing many concussions. It’s not diagnosable until someone dies.

However, many speculate that Brown’s behavior changed dramatically after a helmet-to-helmet hit. However, that hit came from Vontaze Burfict of the Cincinnati Bengals.

Former Tampa Bay Buccaneers wide receiver Antonio Brown walks onto the court during the second half of an NBA basketball game between the Memphis Grizzlies and the Brooklyn Nets on January 3, 2022 in New York.

Former Tampa Bay Buccaneers wide receiver Antonio Brown walks onto the court during the second half of an NBA basketball game between the Memphis Grizzlies and the Brooklyn Nets on January 3, 2022 in New York.
(AP Photo/Adam Hunger)

Brown has been in and out of trouble both on and off the field in recent years. In the last game he played, he stripped off his jersey and pads and stormed off the sideline at MetLife Stadium and was released almost immediately by the Tampa Bay Buccaneers.

In December, domestic charges were brought against him. Two months earlier, a trucker was ordered to pay more than $1 million for an alleged assault. Last month, he came under fire when his Snapchat account posted explicit content about the mother of his four children.

Tampa Bay Buccaneers wide receiver Antonio Brown wipes his face as he leaves the field after throwing his equipment into the crowd while his team was on offense during the third quarter of a game against the New York Jets on May 2. January 2022, in East Rutherford, USA New Jersey

Tampa Bay Buccaneers wide receiver Antonio Brown wipes his face as he leaves the field after throwing his equipment into the crowd while his team was on offense during the third quarter of a game against the New York Jets on May 2. January 2022, in East Rutherford, USA New Jersey
(Andrew Mills/NJ Advance Media via AP)

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Brown remains a free agent. Harrison retired after the 2017 season.

Fox News’ Chantz Martin contributed to this story.