Embattled ex-Patriots wide receiver Antonio Brown is tackling Cleveland Browns quarterback Baker Mayfield on social media, warning him he’d get “beat quick” if the two ever squared off in a fight.

The two began feuding Friday, when Mayfield posted to Instagram a shot of himself taken during a post-game interview at Oklahoma University, where the 6-foot-one-inch walk-on won a Heisman Trophy.

“Just some undersized Walk On … Keep that same energy,” Mayfield wrote beneath the photo.

The cocky caption prompted one of his fans to liken him to the show-boating Brown.

“Win football games. That speaks louder than these AB’ish style posts,” the Instagram user wrote.

Mayfield sarcastically responded: “You’re right. Let me call out my teammates and throw a fit about my helmet and then go freeze my feet off,” he wrote, alluding to controversies surrounding Brown.

Before Brown was cut from the New England Patriots earlier this month amid sexual assault allegations, he feuded with the league over his helmet choice. And in August, Brown said he was severely frostbitten during a cryotherapy session.

Brown launched an angry response.

“Sorry ass Chico keep rolling right you ain’t done nothing in this league the internet only place u would ever talk too or about me. You know u get beat quick slice u up some humble pie,” Brown wrote Saturday morning in a since-deleted tweet.

He followed it by re-posting an article about Mayfield’s 2017 DUI.

“Should of never been drafted before Lamar Jackson what a big scam,” Brown captioned the re-Tweeted article.