 Crombeen then started the 1978–79 season with the Golden Eagles, scoring 15 points (6G-9A) in 30 games, before joining the St. Louis Blues for 37 games, getting 11 points (3G-8A).In 1979–80, Crombeen spent the entire season with the Blues, getting 22 points (10G-12A) in 71 games, and appeared in his first NHL playoffs, going pointless in 2 games.Crombeen then registered 23 points (9G-14A) in 69 games in 1980–81, and chipped in with 3 goals in 11 playoff games, including a goal in double overtime that clinched the Blues' first-round series against the Pittsburgh Penguins.