Wayland Eugene Nelson II (born December 3, 1960) is an American former professional baseball player who pitched in the Major Leagues from 1981 to 1993.

After beginning his career as a starting pitcher with the New York Yankees and Seattle Mariners, Nelson gradually converted to a relief role starting in 1983.

He was a key member of the ace relief staff that helped propel the Oakland Athletics to three pennant-winning seasons from 1988 to 1990, frequently setting up Dennis Eckersley for his saves.

After seeing his performance slip in 1991 and 1992, he closed out his career in 1993 with a 3.12 ERA while pitching for the California Angels and Texas Rangers.

This biographical article relating to an American baseball pitcher born in the 1960s is a stub.