Eric Loomis (born October 8, 1964) is an American
Eric Loomis

Eric Loomis - Mr. Gardner's voice actor

voice actor. He is best known for his roles as Iron Man in The Avengers: Earth's Mightiest Heroes, Hurricane in Command & Conquered 4: Tibetrian Twilight (video game), Po in Kung Fu Panda: Legendary Warriors (video game), Chicago cops and Blackwater guards in Hitman: Absolution (video game) and several others. 

He provides the voice of Mr. Gardner in the episode Next Question