Designated hitter 2012. American League baseball teams play their games with the designated hitter rule, meaning that pitchers do not bat. The league believes that replacing the pitcher, traditionally a weak hitter, with another player in the batting order produces more runs and generates more interest among fans. Below are the average numbers of runs scored per game by American League and National League teams for the 2012 season.

National League Runs American League Runs Colorado Rockies 4.68 Los Angles Angels 4.73 St. Louis Cardinals 4.72 Texas Rangers 4.99 San Francisco Giants 4.43 Detroit Tigers 4.48 Washington Nationals 4.51 Kanas City Royals 4.17 Milwaukee Brewers 4.79 New York Yankees 4.96 Arizona Diamondbacks 4.53 Boston Red Sox 4.53 Philadelphia Phillies 4.22 Minnesota Twins 4.33 Los Angeles Dodgers 3.93 Chicago White Sox 4.62 Cincinnati Reds 4.13 Cleveland Indians 4.12 New York Mets 4.01 Baltimore Orioles 4.40 Atlanta Braves 4.32 Toronto Blue Jays 4.42 San Diego Padres 4.02 Tampa Bay Rays 4.30 Miami Marlins 3.76 Oakland Athletics 4.40 Pittsburgh Pirates 4.02 Seattle Mariners 3.82 Chicago Cubs 3.78 Houston Astros 3.6 Use a Mann-Whitney method to test whether there is really a difference in number of runs scored.