I attended all of the Double AA Wichita Wranglers home games in 2006 (Royals AA team at that time) and had a lot of opposing teams stars sign balls for me. No COA but will guarantee it passing JSA or PSA verification. 

Tulsa Drillers
Colorado Rockies
Chicago Cubs

Look at the provided photos for condition. If you have any questions, be sure to ask before buying.