 Having played his first full season in the NHL, Grant left the Ducks as a free agent and agreed to a one-year, $650,000 contract with the Pittsburgh Penguins on July 20, 2018.Having attended the Penguins training camp and pre-season, Grant was cut from the opening night roster and upon clearing waivers was assigned to begin the 2018-19 season, with AHL affiliate, the Wilkes-Barre/Scranton Penguins.Grant was recalled after 5 games in Wilkes-Barre/Scranton and added depth to the Penguins in recording 2 goals and 5 points in 25 games.