 On May 20, after playing three games for the Indians, Houtteman was sold to the Baltimore Orioles for an undisclosed amount.Hal Lebovitz called Houtteman "a pitcher of considerable promise but who somehow has yet to cash in on it", despite the fact that he was in his 12th and final major league season.During the 1957 Baltimore Orioles season, Houtteman made four relief appearances before he was demoted to the Vancouver Mounties of the Pacific Coast League.