I haven't been on this forum in a while, but I have a 1909 Lancaster Red Roses (Tri-State - Minor League) Team Postcard with Mr. Stan Coveleski on it. It was his first year of professional baseball.
I assume this would trump the 1914 Team PC you have listed at the beginning of this thread. I'd be happy to post a picture when I get home from work tonight, if anyone is interested.
Probably not too many of these floating around out there...
