In the very opening scene, it's supposed to be opening day at Wrigley Field. You see leaves on trees, people shirtless or in tank tops and the outfield ivy in full bloom. There is NO way on opening day in early April in Chicago that trees will be full of leaves, there would be ivy in full leaf and it would be warm enough for everyone to be in shorts and tanks. Normally, it's snowing on opening day in Chicago or the temperature is still in the 40's. If they wanted to make it believable, they should have filmed it on a true opening day, not during a game that was obviously filmed during the summer.