The players' association appealed the penalty, given out by Bob Watson, baseball's vice president in charge of discipline.
John McHale, baseball's executive vice president of administration, heard McClung's appeal Friday during a video conference.
"Yeah, it looked bad, but I have to be aggressive," McClung said.
McClung wrote out his comments for the appeal and had a videotape of the pitch that showed a hitch in his delivery -- indicating bad mechanics rather than intent to throw at Pujols.
Yost served a one-game suspension on Thursday.
"I told you it wasn't on purpose," Yost said. "Why'd I have to serve mine, then?"