He returned to Osijek after the winter break and made his debut for the first team as a late substitute in the 2–1 win against Istra 1961 on 5 March 2011.

[8] On 15 September 2021, Kerala Blasters announced that Lešković had joined the Indian Super League club on a one-year deal.

[9][10][11] He made his debut for the club on 19 November in the 2021–22 Indian Super League season opener against ATK Mohun Bagan FC, which they lost 4–2.

Later on 21 January, the Blasters' head coach Ivan Vukamanovic confirmed that Lešković has suffered small strain in his calf muscle and is expected to be out of action for a month.

[17] He came back from injury on 18 February 2023 against ATK Mohun Bagan in a 2–1 loss, by coming as a substitute in the 83rd minute for the goal-scorer Dimitrios Diamantakos.

[19] Lešković returned to the field on 29 November 2023, in the eighth league game of the 2023–24 season against Chennaiyin FC in a 3–3 draw, by coming as a substitute in the 74th minute for Kwame Peprah.