Just to give a quick background, this is not an original pose. I saw an image like browsing through images in a Google search. I loved the image and when I knew I was going to take Kassidy's pics and her being a catcher I was going to use it.
Now here is a general layout of how I took the picture:
|My original shot out of camera|
Then I noticed that I really didn't like the blue sky and stairs visible on the right of the image. I used a rectangle marquis tool to copy and paste the section of the brick wall on the building in the background and moved it over to cover up the distracting sky and stairs.
Hope this was helpful and gave some insight to what goes through my head both pre and post processing of an image.