Walter Morris "Jeff, Jake" Kalbfleisch (December 18, 1911 – May 16, 1960) was a professional ice hockey defenseman who played 4 seasons in the National Hockey League for the Ottawa Senators, St. Louis Eagles, New York Americans and Boston Bruins. He was born in New Hamburg, Ontario.
He played junior and senior hockey in Niagara Falls, Ontario from 1929 to 1933. That year he signed as a free agent with the Ottawa Senators. He played 22 games for the Senators in 1933-34 and then 3 mroe for their successor team the St. Louis Eagles in 1934-35.
When the Eagles folded in 1935 Kalbfleisch went to the New York Americans in the dispersal draft. He only played 10 games for them and was traded to the Boston Bruins in 1936, where he played one game. The balance of his time was spent in the minor pros.
After 1939-40 Kalbfleisch returned to Niagara Falls to play three years of senior hockey. He retired in 1943.