 Rust made his AHL debut during the 2013–14 AHL season for the Wilkes-Barre/Scranton Penguins.Rust made his NHL debut on December 13, 2014 for the Pittsburgh Penguins in a game against the Columbus Blue Jackets where the Penguins lost to the Blue Jackets in a shootout.He would score his first NHL goal two nights later against Evgeni Nabokov of the Tampa Bay Lightning, on December 15, 2014.