SAN FRANCISCO — Following up on being recognized as the PCL’s pitcher of the month for May, Carson Whisenhunt struck out a season-high 10 batters in his first start of June. Even as the Giants sort through problems in their starting rotation at the major-league level, a promotion for the 25-year-old left-hander isn’t imminent, general manager Zack Minasian told The California Post. “Not at this point,” Minasian said. “We’ll just continue to let him throw and see what happens. It’s a long season.