Posted by Andy on September 5, 2011
The Yankees and Phillies are both outscoring their opponents by at least 1.3 runs per game in 2011. That translates to about 200 more runs scored than allowed over an entire season.
In the Steroids Era of 1993-2009, this was an easier feat since 1.3 runs was a smaller fraction of the overall elevated levels of run scoring. The last teams to have a differential of at least 1.3 over the course of a season were the 2007 Red Sox, 2001 Mariners, 1999 Diamondbacks, 1998 Yankees, 1998 Astros, 1998 Braves, 1997 Braves, 1995 Indians, and 1993 Braves. Even still, a lot of these teams were powerhouses.
Run-scoring in 2011 is 4.28 runs per game, which is the lowest since (you guessed it!) 1992, when it was 4.12 runs per game. So which teams before 1993 managed a 1.3 differential for an entire season? Going back, the last several were the 1986 Mets, 1976 Reds, 1976 Phillies, 1975 Reds, 1974 Dodgers, 1971 Orioles, 1970 Orioles, 1969 Orioles, and the 1961 Yankees. Those were all really good teams.