However, during spring training prior to the 1955 season, Spooner entered a game without warming up properly. A severe arm injury was the result, after which Spooner was out of action until May 15, then made a comeback, appearing in 29 games with the Dodgers that year, but with only fairly mild success. Initially used as a spot starter, Spooner was moved to the bullpen after two poor starts. He was added back into the rotation in late June, removed from it at the end of July, and was then given some spot starts in August and September, finishing the season at 8–6. He appeared in his final major league game on October 3, 1955 when he started game 6 of the 1955 World Series.