Mavericks owner Mark Cuban took a shot at Heat coach Pat Riley during an appearance Wednesday night on CBS's "Late Show with David Letterman."

Cuban, wearing a Ben Roethlisberger jersey, brought up Riley's coaching tactics when he was with the Knicks after Letterman asked about the Dallas owner's contributions to the NBA.

"I've tried to make it more fun, but we've changed the rules around some," Cuban said. "I mean, the game got to a point where it really, it slowed down, and then they went through a whole set of rules changes, which really helped, and then these past couple years, I really got involved to outlaw all the handchecking and all the beating up of guys on the perimeter, so now the game's gotten a lot smoother, so you've got superstars like Dwyane Wade, LeBron James, Dirk Nowitzki who can take the ball to the hoop without all of that old Knicks ball, the old Pat Riley stuff, where they'd just beat up on people. So, we changed it up some."