How Do You Calculate ERA (Earned Run Average)?
Over the past decade, ERA (earned run average) has become one of the most popular statistics in baseball. A pitcher’s ERA is a measure of how many runs, on average, that a pitcher would give up if he pitched for nine consecutive innings. Most people would even agree that a pitcher’s ERA reveals more about his ability than his win and loss record. Calculating a pitcher’s ERA is relatively simple, and can go a long way to finding out the efficiency of your favorite pitcher. Start by adding up all of the earned runs your pitcher has given up this year. Remember to count only the EARNED runs, meaning that all the runs that the pitcher gave up as a result of a fielder’s error do not count towards the ERA. For more information on whether a run was earned, look over the rules by typing in “earned runs” on wikipedia. Then add up the total innings pitched by a pitcher. Each out of an inning counts as 1/3 of an inning. For instance, if a pitcher threw seven innings but could only get one batter
