Youth career Hailing from
Vrgorac, a town without a football club, Roskam went through the youth ranks of
HNK Zmaj Makarska.
NK Zagreb He later moved to
Zagreb for his first senior season to join
NK Zagreb.
Cultural y Deportiva Leonesa Not getting a chance at Zagreb, he moved to Spain, joining the
Segunda B side
Cultural Leonesa, where he spent three seasons as a substitute.
NK Široki Brijeg He moved to
NK Široki Brijeg in 2010, establishing himself as a first team player.
NK Slaven Belupo After three seasons at NK Široki Brijeg, in the summer of 2013, Rostam joined the
Prva HNL side
Slaven Belupo.
Sime Darby F.C. In April 2014, he joined
Sime Darby where he scored a hattrick against
Kelantan in a 4–0 league win.
Tampines Rovers After leaving
Sime Darby, Roskam signed for
S.League title contenders
Tampines Rovers for the
2015 S.League Season. He scored his first competitive goal for Tampines in the second game of the season, earning his new side a 1–0 win against the
Young Lions.
Sarawak Mateo left Singapore and joined
Sarawak for the
2017 Malaysia Super League season. ==References==