I have been working on a facebook app for the last few weeks and it’s been quite a process working out how to colour the shirts (208 teams). I found a perfect way though using after effects and filming using white shirts /black gloves (white tints the best). I then cut out the characters and overlayed the .ai patterns.
I then got the old displacment effect out and keyed the shirts to move when the arms are raised. Worked out alright as you can see from the army of crazed waivers in the clip.
N.B. The scarfs, hats and faces can be replaced in the app.