Calliste played his first professional season with the
Maine Red Claws of the
NBA Development League. In the 2015–16 season he played for
BK Barons of Riga. In 2016, he rejoined the Red Claws. Later in the season, he returned to Canada to play for the
KW Titans. In September he joined the Spanish team
Palencia Baloncesto. In January 2018, Calliste joined the
Moncton Magic and averaged 9.3 points and 2.7 rebounds per game in 34 games. In the 2018–19 season, Calliste averaged 9.4 points, 3.0 rebounds, and 1.3 assists per game. He was named to the All-Canadian Third Team. During the 2019–20 season, Calliste averaged 11.9 points, 3.5 rebounds, and 2.0 assists per game, earning All-Canadian First Team honors. == References ==