Marinelli started playing basketball for the youth selection of KK Jadran, before joining Akademija Vujčić in 2011.

He made his senior debut against KK Alkar in A-1 Liga in February 2012, when he played 7 minutes.

[2] In his first season in Ljubljana, Marinelli had a minor role in the team, playing 9 games in Adriatic League.

On 3 December 2014, he scored a career-high 18 points in an 89 - 67 win over Szolnoki Olaj KK (Round 8, Eurocup).

[3] On 7 November 2021, Marinelli signed in Belgium with Belfius Mons-Hainaut of the BNXT League.