Louis Roberts "Buzz" Stephen (July 13, 1944 – May 9, 2024) was an American Major League Baseball pitcher.

In his one year in the majors, Stephen's salary was $5,400 and he wore number 42.

On October 15, 1968 the Seattle Pilots selected Stephen in the expansion draft.

Stephen was dealt along with Dick Baney from the Milwaukee Brewers to the Baltimore Orioles for Dave May before the trade deadline on June 15, 1970.

[1] Stephen, who both threw and hit right-handed, only pitched in two major league games, making his debut on September 20, 1968.