Turning to coaching, Cook took over as the manager of the Cleveland Barons in the International-American Hockey League (IAHL) in the 1937–38 season. He inherited a team that had struggled the season before and led it to a respectable season, winning 34 of 50 games played combined between the regular season and playoffs. Cook was pressed into service as a player as a result of injuries. His team was able to dress only 10 of 17 players in the deciding game of the Barons' playoff series against the Syracuse Stars. Cook played a regular shift in the game, but the Barons lost, 3–2, in the fourth overtime period.