Scott Campbell woke up on April 19 with a feeling of anticipation and a plan for potential disappointment. A longtime officiator for college football and a retired San Jose firefighter, Campbell had heard rumors that the NFL was making calls that day to a lucky few being recruited as referees for the coming season. Campbell carries himself with a sense of cool confidence and focus — traits that have surely helped him both while fighting fires and making tough calls on the gridiron — but he didn’t get his hopes up that his decadeslong dream was finally coming true. The call that changed his life came at 9:32 a.m. The NFL offered him a spot in one of American sports’ most elite circles — a job that entails hundreds of thousands of fans watching your every move.