Rockers Mr Big have found their drummer Pat Torpey's replacement after Parkinson's disease forced him to cut back on his onstage duties ahead of the group's upcoming world tour.

Ace Frehley's longtime sidekick Matt Starr will step up for the band.

He says, "I'm grateful to announce I will be filling in for Mr Big drummer Pat Torpey on their upcoming tour. Pat is an exceptional drummer and an inspiration for many reasons. I am humbled to have the opportunity to sit in his chair. I will remain the drummer for Ace Frehley."

Torpey is expected to hit the stage for the band's acoustic sets for as long as his condition allows him.

Earlier this summer (Jul14), Torpey told he has been fighting symptoms of Parkinson's disease for the past two years, but his diagnosis was only confirmed recently.

He said, "I intend to fight the disease with the same intensity and tenacity that I drum and live my life by and will continue recording and performing, as always, to the best of my ability."