Trotman has been assigned to the Wilkes-Barre/Scranton Penguins of the American Hockey League.
The Penguins have also changed the status of forwards Sam Lafferty, Joseph Blandisi and Adam Johnson from emergency recall to regular recall.
Bjugstad has missed the last nine games with a lower-body injury suffered against Columbus on October 5, and was centering the third line prior to exiting the lineup. In 34 games since being acquired mid-season last year from the Florida Panthers, Bjugstad has 14 points (9G-5A). He currently sits four goals from 100 in his career.
Rust is looking to make his season debut after sustaining an upper-body injury while blocking a shot in the preseason finale against the Buffalo Sabres on September 28. The speedy winger is coming off of a 35-point campaign where he set career highs in games played (72), goals (18) and game-winning goals (4).
Pittsburgh concludes its three-game road trip tonight in Dallas at 8:00 PM ET at the American Airlines Center. The Penguins return home to PPG Paints Arena on Oct. 29 when they host the Philadelphia Flyers at 7:00 PM for the team's annual 'Halloween Theme Night.'