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Beyond Player Win Average: Compiling Player Won-Lost Records

By Tom Thress

The job of a major league baseball player is to help his team win games, for the ultimate purpose of making the playoffs and winning the World Series. Since the early history of major league baseball, pitchers have been credited with wins and losses as official measures of the effectiveness of their pitching. Of course, pitcher wins are a fairly crude measure of how well a pitcher did his job, as wins are the product of the performance of the entire team—batters, baserunners, and fielders—as well as the pitcher. . . .

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