Michael Clarke Duncan was an American actor, best known for his breakout role as John Coffey in The Green Mile, for which he was nominated for an Academy Award and a Golden Globe. He is known for his very deep voice.

In "The Tan Aquatic with Steve Zissou", he voiced Fozzie Bear during the "Wrong-sounding Muppets" cutaway and during the last scene. However Frank Oz was still alive when the episode first aired, and so a voice change would not be necessary.

In "You May Now Kiss the...Uh...Guy Who Receives" he voiced a boy high on mushrooms.

In the Stewie Griffin: The Untold Story segment "Stu & Stewie's Excellent Adventure" he voiced the stork that, instead of bringing a woman the baby, tried seducing her into making it together with him.

"Ratings Guy" was dedicated to the memory of Phyllis Diller and Michael Clarke Duncan. In addition, Michael also has a voice credit in the episode as the guy with the fancy cowboy boots like Peter's.