Um, duh...
2010, the best home records were Atlanta (56-25), Philly (54-30), and St. Louis (52-49). Philly was 8 games over .500 on the road, while Atlanta and St. Louis were 35-46 and 34-47, respectively.
Now, who, you ask, might have been involved in the scheme? Well the Cardinals vice president in 2010 was none other than - drumroll please - Jeff Luhnow.
And why might have the offending team stopped? Jeff Luhnow left St. Louis in 2011 to join the Astros.