ERA (Earned Run Average)

Earned Run Average (ERA) is a common baseball statistic that measures a pitcher’s effectiveness by calculating the average number of earned runs they allow per nine innings pitched. It’s determined by dividing the total earned runs given up by the pitcher by the innings pitched, then multiplying by nine. A lower ERA indicates better performance, reflecting fewer runs allowed and greater pitching skill. ERA helps compare pitchers’ success regardless of game situations, but it doesn’t account for defensive support or other factors. It’s a key stat for evaluating a pitcher’s overall effectiveness over a period.