Baseball statistic is a term used to describe the various measurements used to evaluate a player's performance in the sport of baseball. ERA stands for Earned Run Average, which is a measure of the number of earned runs a pitcher gives up per nine innings pitched. HIT stands for Hits, which is the number of times a batter successfully reaches base. OUTS stands for OUTS, which is the number of times a batter is put out during an at-bat. WALKS stands for Walks, which is the number of times a batter is awarded first base as a result of four balls being thrown by the pitcher. ERROR stands for Errors, which is the number of times a fielder makes a mistake that allows a batter to reach base or advance further than they should have.