Willie Nelson and Bob Dylan will reunite for a second summer of touring minor league ballparks. Their first date will be May 25 in Fort Myers, Fla., and they will end July 12 in St. Paul, Minn. The Greencards will open the shows. Dylan will also appear at Willie Nelson's Fourth of July Picnic concert at the Stockyards in Fort Worth, Texas. Most tickets go on sale Saturday (April 23) and will cost about $50 for general admission. Dylan wraps up his tour with Merle Haggard on April 30.