have you seen all the Texas Ranger stuff at Party city. That stuff is great.
Ok Kroger does the best cakes. I've used 2 different locations for all my cake needs. They come out looking great. They should be able to take a 1/2 sheet cake and cut out the shape of a jersey. Not very difficult shape so that should be easy to do. Give them a drawing or picture of what you want. They should be able to do it. I'm in McKinney and would suggest going to the at Eldorado and Lake Forest, but that would be a drive for you.
Go Rangers---
I had them do a dog bone shape one time for my dogs first birthday of course this was pre kids stage and she was our baby-but the cake turned out great.