TORONTO - The Toronto Maple Leafs have signed free agent defenceman Roman Polak to a professional tryout.

The 31-year-old blue-liner could give the club needed depth on defence.

Polak is coming off a gruesome leg injury during last spring's playoffs with Toronto.

The Czech recorded four goals and seven assists in 75 regular-season games in 2016-17.

He became an unrestricted free agent July 31.

Known as PTOs, professional tryouts come with no job security but give players with no contract a chance to prove they deserve one.