Clark posted his apology on Twitter on Saturday morning, and the Dynamo say he will personally apologize to the ballboy. Major League Soccer says it's "conducting a thorough review of the facts and examining possible disciplinary action."
The 27-year-old Clark apologized for using "awful language" toward the ballboy. In a second Twitter post, he said: "I didn't mean to disrespect anyone and am sorry for letting my emotions get the best of me. It's not who I am and it won't happen again."