John P. Navin Jr.
John P. Navin Jr. (born July 24, 1968) is an American film and television actor from Philadelphia. He is well known for his roles in the 1981 drama film "Taps" and the 1983 movie "Losin' It", both of which co-starred Tom Cruise. He also starred in "National Lampoon's Vacation" as Cousin Dale. Navin starred in the short-lived 1983 television series "Jennifer Slept Here" with Ann Jillian. Navin also appeared in the pilot episode of the TV series "Cheers", which starred his "Losin' It" costar Shelley Long. He appeared as the first (on screen ) patron of the bar, and delivered the series' first line, inauspiciously presenting Sam Malone with a fake I.D. and claiming he was a Vietnam veteran. He made guest appearances on the television shows "The Facts of Life", "Gimme a Break!", "Silver Spoons", "Cheers", and "Double Trouble".