In September, HC Mountfield also signed Boston Bruins defenseman Andrew Ference and former Blue Jackets defenseman Radek Martinek.
Prospal, a native of Ceske Budejovice, where HC Mountfield plays, collected 16 goals and 39 assists for 55 points in 82 games with Columbus last season.
The 37-year-old joins Blue Jackets teammates Sergei Bobrovsky and Nikita Nikitin to sign overseas during the NHL lockout.
