Stone Sour will be cancelling their remaining tour dates in May, including their appearance on the Rock On The Range festival due to health issues with drummer Roy Mayorga.

A statement released at StoneSour.com says:

It is with regret that we have decided to cancel the remaining dates on our current headline tour.  Our friend and drummer, Roy Mayorga suffered a minor stroke a couple of nights ago after our show in Des Moines.  He’s doing great and is expected to make a 100% recovery.    We apologize to all the fans and look forward to getting back out on the road with Roy in the coming months.