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Pythagorean expectation is a sports analytics formula devised by Bill James to estimate the percentage of games a baseball team "should" have won based on the number of runs they scored and allowed. Comparing a team's actual and Pythagorean winning percentage can be used to make predictions and evaluate which teams are over-performing and under ...
The pitch count is important because the quality of a player's at-bat will vary depending on the pitch count. For example, if a batter is thrown the first pitch of the at-bat (1-0 count), his batting run will be higher than the average batting run. However, if the first ball thrown is a strike (0-1 count), then the batting run is lower than ...
Extrapolated Runs (XR) is a baseball statistic invented by sabermetrician Jim Furtado to estimate the number of runs a hitter contributes to his team. XR measures essentially the same thing as Bill James' Runs Created, but it is a linear weights formula that assigns a run value to each event, rather than a multiplicative formula like James' creation.
A number of MLB players have had a 4.000 career slugging percentage for a short amount of time by hitting a home run in their first major league at bat. However, no player in MLB history has ever retired with a 4.000 slugging percentage.
The Hidden Game of Baseball is a book by baseball statisticians John Thorn and Pete Palmer. It was published in 1984 by Doubleday [ 1 ] and is considered to be a seminal work in the fields of sabermetrics and baseball history .
Thus, if a batter walks to lead off an inning, that team will, on average, score almost one run in the inning. On the other hand, that team decreases its run expectancy by 23 percent [(1 - 0.721/0.941) * 100%] if it successfully bunts and moves the runner to second with one out. [3] [4]
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In the most basic runs created formula: = (+) + where H is hits, BB is base on balls, TB is total bases and AB is at-bats.. This can also be expressed as = = where OBP is on-base percentage, SLG is slugging average, AB is at-bats and TB is total bases, however OBP includes the hit-by-pitch while the previous RC formula does not.