Guenther (upper body) was placed on injured reserve Wednesday and is expected to miss 2-4 weeks.
Guenther will miss the next two games at a minimum, but head coach Andre Tourigny's recent updates on the winger haven't sounded great, The 23-year-old Guenther has just three points over his last 10 contests, so he may have been dealing with his injury for a while before needing to be shut down.