STOCKTON — Andy Prokop, who has led the United Way of San Joaquin County for 19 years as president and CEO, has publicly announced his plans to retire in March 2019.Prokop, 71, informed the organization’s board of directors of his plans a year ago, citing health concerns.“I was going through a routine physical with my doctor about a year ago and at that point he was telling me how great my heart was doing,” said Prokop, who underwent triple [...]