Team Runs Allowed Per Game measures the average number of runs a team gives up on a per game basis by taking the total number of runs a team has allowed over the course of the season divided by the number of games they have played.
More about Team Runs Allowed Per Game Leaders
Because National League teams on average score fewer runs per game than American League teams, N.L. teams usually make up most of the leaders of this statistic. After going up in the late 1990s and early to mid-2000s the average number of runs allowed per game has come down over the past few years.