Thompson underwent shoulder surgery Tuesday and will miss the 5-to-6 months.
Thompson (upper body) is at least a few weeks away from making a return, Bill Hoppe of the Buffalo Hockey Beat reports.
Thompson (upper body) was placed on injured reserve Thursday, Paul Hamilton of WGR Sports Radio 550 reports.
Thompson suffered an upper-body injury against Chicago on Sunday that will cause him to miss 3-5 weeks.
The Sabres recalled Thompson from AHL Rochester on Sunday, Lance Lysowski of The Buffalo News reports.
Thompson was assigned to AHL Rochester on Monday.
Thompson was reassigned to AHL Rochester on Thursday, Bill Hoppe of the Olean Times Herald reports.
Thompson will look to end his lengthy goal drought during Tuesday's meeting in Ottawa.
Thompson is a healthy scratch for Tuedsay's game versus the Flyers, Joe Yerdon of The Athletic reports.
Thompson was assigned to AHL Rochester and immediately recalled to Buffalo, John Vogl of The Athletic reports.