Ben Brown hits setback in quest to return to Cubs as bullpen arm for season’s home stretch and playoffs

PHOENIX – Potentially nearing the end of a monthslong rehab from a stress fracture in a vertebra in his neck, right-hander Ben Brown is once again trapped in the unknown. The Cubs right-hander experienced symptoms in his neck at the end of a two-inning, 34-pitch appearance in a “bridge league” game Tuesday in Arizona, with those symptoms worsening as the day went on. It’s forcing the Cubs to “regroup,” according to manager Craig Counsell, who said Brown will return to Chicago with the team and…