 In the 1937–38 season he scored 17 goals in 18 matches, and the following season 22 goals in as much games.He clinched two titles with Građanski in 1937 and 1940, and one of his most famous club matches occurred in spring 1937 against BSK in Belgrade in which Lešnik scored a hat-trick in the first seven minutes of the game.In 1936, Lešnik scored three goals in an exhibition match against Liverpool F.C.