Grieves was drafted 16th overall in the 2016 CWHL Draft by the Boston Blades. Grieves was selected as one of two US-born players for the 3rd [Canadian Women's Hockey League All-Star Game|2017 CWHL Allstar Game] where she scored a goal in the third period. In her first season on the Blades, Grieves led the team in assists, and was second in points both her first and second seasons behind Kate Leary. Her final season in the CWHL she led the team in points.