Roland Smits started his basketball journey at Valmiera. His quality caught the attention of Montakit Fuenlabrada, who added him to their lower categories in 2011. As part of his training, he was loaned to Ávila of LEB Plata during the 2012/13 season. In 2013/14, he combined playing for the first and reserve teams of Fuenlabrada but since the 2014/15 campaign, he was solely part of their first team.
In 2016/17 he earned the EuroCup Rising Star award, and Barça signed him at the start of 2017/18 after reaching an agreement with the Madrid team. During that campaign he played on loan back at Montakit Fuenlabrada, before returning to the Barça first team in the summer of 2018, and with a contract until 2022.
A power forward able to play in the outside positions, he has the ability to score from medium and long distances.