Patrick Leonard Sajak wasn’t exactly a household name when he first stepped in for former “Wheel of Fortune” host Chuck Woolery at the end of 1981. “Welcome to ‘Wheel of Fortune,'” Sajak said in his debut episode before cutting right to his trademark humor. “Please do not adjust your sets at home; Chuck Woolery has not shrunk,” Sajak said jokingly. “A lot of people are playing with their vertical hold right now. “As [voice-over announcer Jack Clark] mentioned, my name is Pat Sajak, and I’ve been fortunate enough to wander onto the set of a very successful program. Has been for a long time.” Th…