Moneyball is a film starring Brad Pitt and Philip Seymour Hoffman and Jonah HIll. It’s based on the true story of Oakland A’s Baseball team manager, Billy Beane (Pitt), who along with Ivy League Economics graduate and Uber Maths Nerd Peter Brand (Hill) used player stats to save the Oakland A’s baseball team in 2002. Beane had to deal with enormous budget restraints ( Oakland A’s budget was $4o million compared with the Yankee’s $125 million), he showed that the statistics were more effective than experience ie. the stats beat the club selector’s know-how. This equation is called the Pythagorean Expectation. So what’s going on? This equation, doesn’t give you that much information. We will fix ‘runs allowed’. OK. If ‘runs scored’ is high Win is high; it ‘runs scored’ is low Win is low. Um, this means scoring runs is good. Yeah! I knew that without the maths. The 2002 A’s scored a total of 800 runs, and allowed a total of 654 runs, for a Pythagorean Expectation of: This compares to the team’s actual win percentage of 103/162, which is around 0.636.