Do you want to compare Sgt. Rock with Donald Pierce? Discover the powers, weakness & weapons of Sgt. Rock and Donald Pierce from Sgt. Rock Biography and Donald Pierce Biography. Find out all about Sgt. Rock and Donald Pierce.# Check out how is Sgt. Rock unique and distinct from Donald Pierce. Discover their love interest, sidekicks, family tree and the movies and games list in which Sgt. Rock and Donald Pierce have appeared. Find out everything about them here!