Understanding Sabermetrics

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Book: Read Understanding Sabermetrics for Free Online
Authors: Gabriel B. Costa, Michael R. Huber, John T. Saccoma
completing one of his 755 home runs. Visualize Pete Rose’s single which surpassed Ty Cobb’s lifetime total of hits. Cobb won twelve batting titles in thirteen years. Rogers Hornsby averaged .402 over a five-year stretch. Lou Gehrig slugged twenty-three grand slam home runs.
    Hitting. It has consumed us, right up through these past years of the McGwire-Sosa-Bonds home run explosion. All of the players mentioned above, and scores of others were (or are) great hitters. But we will now ask a “What if?” question. This, in turn, will provide impetus for the idea of the EC.
    Two of the national pastime’s most famous hitters were Ted Williams and Babe Ruth. Many have argued quite convincingly that one or the other was the greatest hitter ever. Williams’ career spanned four decades (1939- 1960) and Ruth’s twenty-two-year career went from 1914 until 1935. As great as their records were, however, their at-bats totals were relatively small: Ruth batted about 8400 times; Williams approximately 7700 times. Even when their base on balls totals are brought into the discussion (over 2000 for both sluggers), the number of times they each appeared at the plate pales in comparison to other great hitters. Williams was called into the armed forces twice: for World War II and during the Korean War. Ruth began his career as a pitcher, not playing every day; he also lost time due to suspensions (for example, in 1922 and 1925) and to illness (1925). In contrast, Pete Rose batted over 14,000 times and Hank Aaron had well over 12,000 at-bats.
    Williams and Ruth were not the only ones with a lower-than-expected number of plate appearances; others, for one reason or another, had a similar fate. For example, Ruth’s teammate, Yankee legend Lou Gehrig, died before he reached the age of thirty-eight. Hall of Famer Sandy Koufax retired before his thirty-first birthday. And All-Star Don Mattingly will most probably be denied entrance into the Hall of Fame primarily because of his diminished career totals, brought on by a chronic back injury which led to his premature retirement. One wonders how the records of these three individuals — and many more — would read if their careers had been extended.
    Returning to Williams and Ruth, we ask the following question: “Although they posted great numbers, can we speculate about or predict — in any reasonable way — what numbers they might have accumulated, given more hitting opportunities? Is there a plausible way to project or estimate what might have been, given different circumstances?
    Specifically, we will attempt to answer three questions:
    • What would Williams’ totals have been had he not lost so much time?
    • What if Ruth had not started out as a pitcher?
    • Who was the greater hitter: Williams or Ruth?
     
    To give us a starting point regarding these questions, we consider the table below, which gives some of the career totals for both Hall of Famers (see Pre-Game : Abbreviations and Formulas at the beginning of this book for definitions):
     
    Table 5.1 Williams versus Ruth — lifetime totals
     
    To attempt to answer these questions, we will make three assumptions:
    1. Let us suppose that both Williams and Ruth had, for the sake of argument, 12,500 plate appearances (PA). By a plate appearance we mean either an AB or a BB, neglecting both sacrifices and being hit by a pitch, since these numbers are relatively small compared to PA.
    2. Furthermore, let us assume that their respective additional ABs are to be determined by preserving the ratio of AB to PA.
    3. Finally, let’s introduce a special factor. Let us assume that Williams would have been 5% better for his time missed, since these years were prime years. As an added scenario, we will also assume that he would have been 10% better . At the same time, since Ruth pitched early in his career, we will suppose that for his added AB he would have been 5% less the hitter he was during the latter years of his

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