Roslovic's performance during two seasons with the United States National Team Development Program attracted the interest of the Winnipeg Jets, who selected him in the first round (No. 25) of the 2015 NHL Draft. After one season with Miami University, he signed a three-year, entry-level contract with the Jets on July 18, 2016.
Roslovic led Manitoba of the American Hockey League in scoring during the 2016-17 season with 48 points (13 goals, 35 assists) in 65 games. He also made his NHL debut with the Jets in his hometown, Columbus, Ohio, against the Blue Jackets on April 6, 2017.