After missing most of his debut pro season with an injury, he won ten games in 1941 for the Harrisonburg Turks of the Class C Virginia League and, according to his 1977 obituary, "seemed headed to stardom".

[1] World War II intervened, however, and Kucab would spend 47 months in the United States Army, where he saw active duty in both the European and Pacific theaters.

[1] Kucab made his major league debut at age 30 on September 14, 1950, throwing five innings of scoreless relief against the Chicago White Sox at Comiskey Park.

[4] It was Kucab's first MLB victory but an "historic achievement" as Mack's 3,729th and final win as a big-league manager in a 53-year career that included a half century with the Athletics.

His obituary stated: "Among his top performances in baseball is a string of 19 straight wins while pitching for Ralph Houk at a New York Yankees farm team".