Complex sentence: Robert Dale "Rob" McElhenney (born April 14,1977) is an American film and television actor best known for his role as Mac on the FX TV series "It's Always Sunny in Philadelphia".
Split into simpler sentences: Robert Dale "Rob" McElhenney (born April 14,1977) is an American actor. He is best known for his role as Mac on the FX series "It's Always Sunny in Philadelphia".