Here is a tutorial on doing baseballs, it does not look like a simple project. As I read through the series of steps listed it seemed to be a lot more work than most are willing to do. See for yourself. Post it if you do it, and tell us how it worked out for you.
http://www.instructables.com/id/R...
Linda V
Michele921 might be willing to share that with you, if you send her a Private Message via the Inbox. There is a YouTube video on how to do a baseball stitch. You will find the stitch at point 2:20 in the video.
http://youtu.be/ja-BWvLlKh4