Locke, who stood 5 feet 11 inches (1.80 m) tall and weighed 185 pounds (84 kg), spent nine years (1950–1958) in professional baseball; all but four games were played in the Baltimore organization.

[1] He signed with the franchise in 1950 when it was still the St. Louis Browns and was recalled by the Orioles in 1955 after he won 18 games for the San Antonio Missions of the Double-A Texas League.

Locke allowed one baserunner, on an error, but got out of the inning unscathed when Eddie Yost's fly ball resulted in a 9–6–5 double play.

In his second and final appearance a week later, also against the Senators (but at Griffith Stadium), Locke pitched the last two innings of a 7–3 Oriole defeat.

He retired Washington in order in the seventh, and in the eighth recorded his only Major League strikeout (Yost) and base on balls (José Valdivielso).