“He ate gunpowder every morning,” complained one umpire, “and washed it down with warm blood.” That described John McGraw, who in the 1890s was the rowdiest member of the ferocious Baltimore Orioles, the club that pioneered the hit-and-run, the cutoff, the squeeze play, and the “Baltimore chop.” In 1902 he began his thirty-season reign as manager of the Giants, winning ten pennants—a record matched only by Casey Stengel. His career in baseball spanned forty years and two eras—from the game’s raucous early days to its emergence as big business.Charles C. Alexander, a professor of history at Ohio University, Athens, and the author of Ty Cobb, calls John McGraw “perhaps the single most significant figure in baseball’s history before Babe Ruth transformed the game with his mammoth home runs and unparalleled showmanship.”