The band has tapped Sass Jordan to perform the part of Sister Mary on the tour they announced yesterday on their Facebook page. Apart from S.U.N., she has worked with Aerosmith, Alice Cooper, Cheap Trick, Van Halen, Carlos Santana and Joe Cocker.

Jordan's S.U.N. bandmate Brian Tichy will also be taking part in the tour. He has been recruited to fill in on drums for Simon Wright for the dates taking place in June.

The tour will be kicking off on May 16th in Milwaukee, WI at the Potawatomi Casino and will conclude on June 29th in Seattle, WA at The Moore Theater.

Tichy won't be the only fill-in musician on the trek. The band previously announced that Disturbed's John Moyer would be sitting in for Rudy Sarzo for five dates on the trek including all of the dates this month and the first two dates in June.

"I am very excited and honored to have John Moyer stepping in for Rudy Sarzo on some of the upcoming Queensryche shows in May. I have admired John's work with Disturbed and look forward to his contribution to the Operation: Mindcrime presentation." � Geoff Tate

"In a world where 'albums' have been replaced by 'singles' it is an honor to perform one of the greatest concept albums of all time from start to finish. Operation: Mindcrime is just as powerful today as it was 25 years ago. My thanks to Geoff Tate and Rudy Sarzo for asking me to fill in on these shows while Rudy is gone." � John Moyer