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|Date of birth||21 October 1967|
|Place of birth||Sivac, SFR Yugoslavia|
|Height||1.86 m (6 ft 1 in)|
|* Senior club appearances and goals counted for the domestic league only.
Leković was born in Sivac, Serbia, Socialist Federal Republic of Yugoslavia. In his country, he played mainly for lowly Yugoslav First League outfit FK Budućnost Titograd, also spending one season with country giants Red Star Belgrade; he played in 17 of 30 games in the competition's last edition, while also starting in both legs of the domestic cup, lost to FK Partizan.
After one 1/2 seasons with another modest side, FK Mogren, Leković joined Kilmarnock in Scotland, where he started during most of his spell (which consisted of two full seasons and two-halves), being part of the squad that conquered the Scottish Cup in 1996–97, 1–0 against Falkirk.
In January 1998, Leković started an unassuming stint in Spain; he experienced relegation from La Liga and promotion from the second division respectively with Sporting de Gijón and Málaga CF, but was only second-choice in both cases. He closed out his career at nearly 37, after representing AEK Larnaca F.C. and Perth Glory FC.
He made the country's final roster for two FIFA World Cups: 1990 and 1998, but did not see a single minute of action at either tournament, as third-choice. He later went on to represent the Serbian national team.