Peoria, AZ – Nelson and Nelson’s Mitch Guthrie charged his way to the top of the Pro SxS podium at round three of the 2015 Rocky Mountain MC World Off-Road Championship Series Presented by Maxxis and Dirt Wheels with H&M Motorsports’ David Haagsma in second and Ryan Piplic in third while Ray Bulloch claimed the Pro Stock SxS win. While