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Using the average number of runs scored against a pitcher in nine innings (ERA) does not tell us enough about the success of a pitcher. Why?
A) Runs may be scored if fielders are not good.
B) Weather is a factor in player performance.
C) Batters may get hits or they may walk.
D) Severe injuries may inflate scores.
The correct answer is A) Runs may be scored if fielders are not good.
Explanation: The Earned Run Average (ERA) measures the average number of runs a pitcher allows per nine innings, but it does not account for the performance of the fielders behind the pitcher. If fielders make errors or fail to make plays, it can lead to unearned runs that are not solely the responsibility of the pitcher. Therefore, ERA alone might not fully represent a pitcher’s effectiveness.