Game score is a metric devised by Bill James as a rough overall gauge of a starting pitcher's performance in a baseball game. It is designed such that scores tend to range from 0–100, with an average performance being around 50 points. Formula To determine a starting pitcher's game score: Start with 50 points. Add one point for each out recorded, so three points for every complete inning pitched. Add two points for each inning completed after the fourth. Add one point for each strikeout. Subtract two points for each hit allowed. Subtract four points for each earned run allowed. Subtract two points for each unearned run allowed. Subtract one point for each walk. History James first introduced game score in the edition of his Baseball Abstract. He called it "a kind of garbage stat that I present not because it helps us understand anything in particular but because it is fun to play around with." Other versions James has noted that there are cases in which his original version of game score does not accurately reflect a pitcher's performance. In a September 2003 article in Baseball Prospectus, Dayn Perry created an updated formula based on the ideas behind defense-independent pitching statistics, named Game Score 2.0. In December 2014, statistician Tom Tango made another attempt at updating the formula, which he also called "Game Score Version 2.0". This version applies a base of 40 points to starting pitchers' game scores (instead of 50), adjusts the point values of certain in-game events, and introduces a penalty for giving up home runs into the equation. Game Score Version 2.0 is the variant displayed on MLB.com. According to James, the original version of game score correlates more closely with team winning percentage and ERA than Tango's version. Highest achieved scores The highest game score for a nine-inning game in the major leagues is 105, achieved by Kerry Wood for the Chicago Cubs against the Houston Astros on May 6, 1998, in just his fifth major league start. Wood's performance included 20 strikeouts, zero walks, and just one hit. The second highest nine-inning game score is 104, which occurred on October 3, 2015, when Max Scherzer of the Washington Nationals allowed no hits and no walks, striking out 17, against the New York Mets. This is also the highest game score ever for a major league no-hitter. The 100th game score of 100 points