Dan Butler

Daniel Eugene Butler (born December 2, 1954) is an American actor known for his role as Bob "Bulldog" Briscoe on the TV series ''Frasier'' (1993–2004); Art in ''Roseanne'' (1991–1992); for the voice of Mr. Simmons on the ''Nickelodeon'' TV show ''Hey Arnold!'' (1997–2002), later reprising the role in ''Hey Arnold!: The Jungle Movie'' (2017); and for film roles in ''Enemy of the State'' (1998) and ''Sniper 2'' (2001). Provided by Wikipedia