Legendary musician and Pittsburgher Donnie Iris is recovering after undergoing surgery for cancer.A post on "The Cruisers" Facebook page says it was discovered Donnie had cancer after his 80th birthday show back in March.We're told his prognosis is good, but he will not be able to perform in Youngstown on June 21 with REO Speedwagon.Donnie does look to resume touring starting in July for a show with Foreigner and Loverboy.