Trotter, 24, played with Riga in Kontinental Hockey League last season, putting up 9 goals and 26 points.
Before going to Riga, Trotter had played the previous three seasons with Hamilton, Montreal's farm team in the American Hockey League. There, the 5-foot-10, 180 pound left winger amassed 57 goals and 135 points in 172 games. In his final year with the Bulldogs, 2009-10, Trotter led the team with 36 goals.
Never drafted, Trotter joined Montreal as a free agent in 2008, but managed just two games at the NHL level.