On 15 June 2006, he was named head coach of the club,[2] but following a series of poor results in the NLB League, he was sacked on 13 December 2006.

[3] Following the dismissal at his hometown, Mršić was appointed head coach for Pallacanestro Varese of the Italian Serie A on 13 June 2007.

[4] In 2011 Mršić was named head coach of the Cedevita junior team, with which he celebrated winning the 2012 Croatian championship title.

[20] In December 2024, after a bad start of the 2024–25 ACB season, winning in only two of the first nine games, Mršić was replaced by Luis Casimiro as the head coach.

[23] Mršić debuted at Croatia bench at the 2019 NBA Summer League, while in July he celebrated winning the Stanković Cup title in China.

[24][25] On 5 February 2020, Mršić published the roster for the 2022 EuroBasket qualifiers, bringing back two experienced players, Krunoslav Simon and Roko Ukić, on the national squad.