The Oakland Raiders receiver first took to Twitter on Sunday to offer some words of wisdom.
The 30-year-old's relationship with the Steelers only worsened from that point on, and Brown proceeded to ask for a trade.
In response to that criticism, Smith-Schuster used Brown's own tweet against him and launched into a string of attacks against his former brother in black and yellow.
Smith-Schuster had previously defended Ben Roethlisberger, with whom Brown clearly has beef. Plus, the content of the message only paints Smith-Schuster in a kind light. Brown's double-up left Smith-Schuster little choice but to respond.
Yesterday, he took shots at JuJu Smith-Schuster in regarding to Smith-Schuster being named the Steelers team MVP. "Onlookers may not be able to tell the difference".More news: Magic Johnson Steps Down as Lakers President
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The message violates Smith-Schuster's privacy. Some at the time couldn't help but wonder whether it was just by happenstance that the background of the photo included an onlooking Brown.
Brown and Smith-Schuster had traded words over Twitter on Sunday.
"I respect his game but I can't wait to smash this dude".
That tweet was soon followed by this advice from Brown: "Do not listen to any National Football League player who haven't got paid yet!" He added, "Sad but true".
As a result, Brown has fallen under harsh criticism from media and fans alike, and it doesn't seem like he is taking it too well.