Leslie Ferdinand "Buster" Narum (November 16, 1940 – May 17, 2004) was an American professional baseball player.

Listed as 6 feet 1 inch (1.85 m) tall and 194 pounds (88 kg), he was a right-handed starting pitcher in Major League Baseball for the Baltimore Orioles (1963) and Washington Senators (1964–1967).

Born in Philadelphia, Narum graduated from high school in Clearwater, Florida.

He signed with Baltimore at age 17 in 1958 and debuted with the Orioles early in the 1963 season, finishing with no decisions in nine innings of work.

On May 3, 1963, Narum became the first-ever Oriole player to hit a home run in his first Major League at-bat, connecting off Don Mossi of the Detroit Tigers in an 8–5 Baltimore triumph.