Marošević was born to a Croat father and a Serb mother in Bosnia in Yugoslavia prior to the Bosnian War, and initially moved to Frankfurt, Germany with his parents as a young child to escape the conflict, before eventually settling in Rockford, Illinois.

[6] In June 2010, having found it increasingly difficult to break into the FC Dallas first team, Marošević was loaned to USSF-D2 side Austin Aztex.

[8] Marošević scored a hat-trick for the Aztex in a second round Lamar Hunt U.S. Open Cup game against Arizona Sahuaros on June 22, 2010.

Marosevic ignited a comeback by scoring on his debut in the 63rd minute followed by a Danny Koevermans strike, earning a well-fought 2–2 away draw for Toronto FC.

[11] Marošević made his mark on the Reds season once again scoring against UNAM Pumas in the CONCACAF Champions League group stage, the game ended in a 1–1 home draw to the Mexican side.