Ryan Poehling had surgery for tonsillitis and a deviated septum on July 7 and will not participate in any game action for the United States this week.
The 19-year-old center, who was selected No. 25 in the 2017 NHL Draft by the Montreal Canadiens, has been able to skate and work out on his own at the camp, which concludes on Saturday.
"I've been sitting out the past month, laying in my bed and eating applesauce. So to come here, it's good for me," Poehling said. "You have to get out of bed, do the things necessary to get back into the routine.
"I won't play in any games; I'm just here to practice and be with the guys because that's the biggest thing at the summer camp. You want to get to know everyone, create bonds that you can carry over into December."
Poehling (6-2, 200), who attended Canadiens development camp in June, will return to St. Cloud State University for his junior season in 2018-19. He has 44 points (21 goals, 23 assists) in 71 career college games, including 31 points (14 goals, 17 assists) in 36 games last season.
He had one goal and two assists at the IIHF 2018 World Junior Championship to help the U.S. win the bronze medal.