In the 2012 season of IPL, Mandeep scored 432 runs from 16 matches, including two half-centuries, and ended the tournament as Kings XI Punjab's leading run-scorer. He was also adjudged the winner of "Rising Star of the tournament Award". He was the highest run scorer in 2015 Vijay Hazare Trophy. On the back of his form in the tournament, he was selected for 2015 tour of Zimbabwe. In January 2018, he was bought by the
Royal Challengers Bangalore in the
2018 IPL auction. In 2019, he was again bought by
Kings XI Punjab and he was retained by the team for IPL 2021 after recently concluded IPL 2020. In February 2022, he was bought by the
Delhi Capitals in the
auction for the
2022 Indian Premier League tournament. He was one of the most consistent run scorers in the latest editions of
Ranji Trophy after missing
2017–18 season. He scored 602 runs in
2018–19, 696 runs in
2019–20, 376 runs in
2021–22 and 463 runs in
2022–23. He averaged more than 50 in each year with a cumulative average of 64.76 in this period. Despite this golden patch in his peak age, he was never called up to
India national cricket team or called back to
India A cricket team. He represented Tripura for one season, in 2024-25. He also captained them across formats that season. After just one season, he left Tripura. ==Personal life==