When baseball's reserve clause was struck down in late 1975 and ushered in free agency, club owners feared it would ruin the game; instead, there seemed to be no end to the "baseball fever" that would grip America. In Gathering Crowds: Catching Baseball Fever in the New Era of Free Agency, Paul Hensler details how baseball grew and evolved from the late 1970s through the 1980s. Trepidation that without the reserve clause only wealthy...