William Mark Fagerbakke (born October 4, 1957) is an American actor. He voices Patrick Star in the animated series SpongeBob SquarePants and played Michael "Dauber" Dybinski on the sitcom Coach (1989-1997). He also appeared in 12 episodes of the sitcom How I Met Your Mother as Marshall Eriksen's father Marvin. He portrayed Tom Cullen in the 1994 miniseries The Stand.
Fagerbakke was born in Fontana, California and moved to Rupert, Idaho as a boy. He attended the University of Idaho and was a star football player for the Idaho Vandals until he injured his knee and ended his athletic career. He graduated from the University of Idaho in 1981 and attended graduate school at Southern Methodist University in Dallas,Texas