Chosen by the Dallas Stars with the No. 29 pick in the 2013 NHL Draft, Dickinson became an NHL regular with Dallas during the 2018-19 season, finishing with 22 points (six goals, 16 assists) in 67 games. He followed that with 21 points (nine goals, 12 assists) in 65 games in 2019-20, then scored four points (two goals, two assists) in 27 postseason games, helping the Stars reach the Stanley Cup Final for the first time since 2000 before losing to the Tampa Bay Lightning.
The center, a native of Georgetown, Ontario, played four seasons of junior hockey for Guelph of the Ontario Hockey League. During that time, he was named to the OHL Second All-Rookie Team, competed in the 2013 CHL Top Prospects Game and won gold for Canada at the 2013 IIHF World Under-18 Championship.