Yager was summoned from AHL Manitoba on Monday.
In a corresponding move, Winnipeg moved Josh Morrissey (wrist) to injured reserve. Yager has notched five goals and four assists in six AHL appearances this campaign. He could make his NHL season debut as early as Tuesday's road matchup against St. Louis, but it's unclear if he will be in the lineup. He could be with the Jets just for insurance during the team's three-game road trip.