Last year, Roberts played with Olympiacos B.C. in Piraeaus, Greece. He averaged 6.9 points, 1.4 assists and 1.7 rebounds in 32 games.
It was the first time Roberts played in Europe since 2012, when he helped lead Brose Basket Bamberg to its third straight national championship. He started his professional career in 2008-09 in Israel.