He was drafted 28th overall by the Chicago Blackhawks in the 1980 NHL Entry Draft. After one more year of junior hockey, Ludzik turned pro in 1981-82. He split that season between the Blackhawks and the American Hockey League's New Brunswick Hawks. The next season he became a Blackhawk regular. Ludzik played with the Blackhawks until the 1988-89 season. Except for 11 games with the Buffalo Sabres in 1989-90, he spent the rest of his playing career in the minors. He played in 424 NHL games and scored 46 goals and 93 assists.