On June 30, 2015, Morin was reacquired by the Blackhawks (alongside Marko Daňo, Artem Anisimov, Corey Tropp and a fourth-round draft pick in 2016) in a multi-player deal that sent Brandon Saad, Alex Broadhurst and Michael Paliotta to Columbus. In the 2015–16 season, Morin was familiarly returned to Chicago's AHL affiliate, the IceHogs. In 28 games, he contributed to the IceHogs with 22 points before on January 3, 2016, he was traded to the Toronto Maple Leafs in exchange for right winger Richard Pánik. Morin was directly assigned to the AHL's Toronto Marlies and appeared in just 13 games before he was again included in a trade (alongside James Reimer) to the San Jose Sharks in exchange for Alex Stalock, Ben Smith and a conditional fourth-round pick in 2018 on February 27, 2016. Morin completed the season playing in 18 games for 14 points with the Sharks' AHL affiliate, the San Jose Barracuda.