Buchanan, MI - The 2011 AMA ATV Motocross National Championship Series presented by DWT has been filled with excitement and drama all season long, leading to a renewed fight for the AMA Pro class title. Dominant points leader Chad Wienen suffered a season ending crash last month, knocking him out of the running for a title this year. Meanwhile, Motoworks Can-Am teammate John Natalie concurrently underwent a surgery to repair a broken arm; however, Natalie has managed to attend every round of racing, staying ahead of Baldwin Motorsports Honda's Josh Upperman is only 3 points below Natalie for the lead. Natalie concurrently underwent a surgery to repair a broken arm; however, Natalie has managed to attend every round of racing, staying ahead of Baldwin Motorsports Honda's Josh Upperman, who sits only three points behind the leader heading to RedBud MX this weekend.