Who holds the world record for the fastest pitch ever?

Just as Mickey Mantle is the king of mammoth home runs, Nolan Ryan is the king of blazing fastballs. In addition to his prodigious strikeout totals, Ryan also heaved the fastest pitch ever thrown in a major league game since the advent of radar guns. On September 7, 1974, in a start against the Chicago White Sox, one of his pitches was clocked at 100.8 miles per hour. Only imaginary Met prospect Sidd Finch has bested that mark.