Dickinson, 22, has appeared in 13 games with Dallas this season registering 12 shots and ten penalty minutes. In 33 games played with Texas this season, he has produced 22 points (16-6=22) and his 16 goals are second on the team.
The 6-foot-1, 200-pound native of Georgetown, Ont. was originally selected by Dallas in the first round (29th overall) of the 2013 NHL Draft.
Heatherington, 22, has appeared in five games with Dallas this season recording one assist (0-1=1), a +3 plus/minus rating and 26 penalty minutes. He has also registered 13 points (3-10=13) in 41 games played for Texas this season.
The 6-foot-4, 225-pound native of Calgary, Alta. was acquired by Dallas from Columbus in exchange for Lauri Korpikoski on March 1, 2017. He was originally selected by Columbus in the second round (50th overall) of the 2013 NHL Draft.