Baseball is a unique game because it is the only professional sport where the dimensions of the field of play can vary based on whoever the home team is.

As a result, organizations can build their team around the strengths and weaknesses of their park.

For example, the San Diego Padres have consistently built their teams the past few years with a rotation of fly-ball pitchers and a lineup of strong defenders in order to compensate for the home run suppressing ways of Petco Park. 

The New York Yankees and the Texas Rangers, whose parks support a bevy of long-balls, have recruited power hitters and ground-ball pitchers to maximize the effects of their dimensions.

There are a lot of factors that go into the flight distance of a baseball. The primary ones are pitch speed and bat speed. 

But the thin air in Colorado leads to balls being hit further. Swirling winds in Chicago can encourage or suppress home runs depending on the day. And the steady atmosphere of a domed stadium allows the Toronto Blue Jays to tee off at the Rogers Centre.

What follows is a list of the nine parks in baseball whose environments encourage home runs based on small dimensions, or relatively small dimensions when other factors are considered.