If masters track had a Hall of Fame for Spouses, Linda Sheldon Pain would be a charter inductee. The second wife of the late founder of our niche sport, Linda married David Pain in 1979. David’s first wife, Helen, was critical to spreading the movement via her travel agency and help with the U.S. Masters International Track Team. But Linda was key as the prime supporter of David and being active in the Senior Olympics circuit. When David couldn’t speak, she spoke for him. When he could barely move, she made him comfortable, setting him up for hospice care in…