The center elbowed the Los Angeles Lakers shooting guard in the face in the fourth quarter of the 108-90 win, leading to a scuffle between the two players which had to be broken up by their teammates.
After the game, the 28-year-old told reporters: "What do y'all want me to say, because I'm not [going] to give y'all nothing. It's stupid. We won the game.
"It's over with. I mean, there's no need to go into it. We won the game. It's about basketball. I mean it's over with. It's nothing. I'm not even focused on it."
Howard left the Lakers in 2013 before joining the Rockets as a free agent.