The Pittsburgh Steelers disciplined all-pro receiver Antonio Brown for his absence from the franchise's facility Monday following a disappointing loss, though coach Mike Tomlin refused to reveal the nature of the punishment.

“He and I met yesterday for an extended period of time,” Tomlin said Wednesday. “I will leave the nature of that conversation between us. There was discipline involved for his missed meeting for Monday. Some of the other things we talked about extensively he’ll speak for himself in some of those things. Really, our focus is preparing to win this game on Monday night, but I did want to give you guys an update.”

In a statement issued Tuesday, Brown’s agent, Drew Rosenhaus, said the receiver “had a personal matter” and that Rosenhaus “talked to the team about it.”

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Brown did not show up to the team’s facility Monday after a 42-37 loss Sunday against the Kansas City Chiefs. During the game, he caught on camera having a heated exchange with Steelers offensive coordinator Randy Fichtner on the sideline.

“AB is a very passionate football player,” Steelers quarterback Ben Roethlisberger said. “I think we all know that, the fans know that. That's what makes him special, is his passion for this game and the passion to be great. We're not going to want to take that away from him. When he gets frustrated in games, I’ve got to just tell him to stay with me, talk to me, communicate with me. Let me know if I missed you on something, if you're getting open and I didn't see you. Let's just talk and communicate. He does a great job of doing that."

Brown is expected to address reporters Thursday.

Brown also generated news coverage Tuesday for his response to a former Steelers public relations staffer, who hypothesized on Twitter that the receiver's prolific career has largely been the result of having Roethlisberger as his quarterback. Brown responded: “Trade me let’s find out.”

“He's the best in the world,” Roethlisberger said of Brown. “When you're the best in the world, you want to help participate, you want to win football games. We're all a little frustrated because we're not winning right now.”

Follow Lorenzo Reyes on Twitter @LorenzoGReyes.