I think so. . .there may be some MLB policy regulating the length of grass, but I’m not aware of it. Honestly, major league baseball—and all sports—would be far better off if they would permit teams to do more to make one park distinctive from another—even so far as making the bases 85 feet apart in one park and 95 in another. Standardization is an evil idea. Let’s pound everybody flat, so that nobody has any unfair advantage. Diversity enriches us, almost without exception. Who would want to live in a world in which all women looked the same, or all restaurants were the same, or all TV shows used the same format? People forget that into the 1960s, NBA basketball courts were not all the same size--and the NBA would be a far better game today if they had never standardized the courts. What has happened to the NBA is, the players have gotten too large for the court. If they hadn’t standardized the courts, they would have eventually noticed that a larger court makes a better game—a more open, active game. And the same in baseball. We would have a better game, ultimately, if the teams were more free to experiment with different options. The only reason baseball didn’t standardize its park dimensions, honestly, is that at the time that standardization was a dominant idea, they just couldn’t. Because of Fenway and a few other parks, baseball couldn’t standardize its field dimensions in the 1960s—and thus dodged a mistake that they would otherwise quite certainly have made. Standardization destroys the ability to adapt. Take the high mounds of the 1960s. We “standardized” that by enforcing the rules, and I’m in favor of enforcing the rules, but suppose that the rules allowed some reasonable variation in the height of the pitching mound? What would have happened then would have been that, in the mid-1990s, when the hitting numbers began to explode, teams would have begun to push their pitching mounds up higher in order to offset the hitting explosion. The game would have adapted naturally to prevent the home run hitters from entirely having their own way. Standardization leads to rigidity, and rigidity causes things to break.