For whatever it is worth, here is a list of the birthplaces of BB players from the top 13 states during the "deadball" era (found in the T206 set)......
1) Pennsylvania - 70 (Jennings, Mathewson, Plank, Wagner)
2) Ohio - 46
3) New York - 44
4) Illinois - 27
5) Massachusetts - 18
6) Missouri - 15
7) Michigan - 13
8) California - 11
9) Wisconsin - 11
10) Indiana - 10
11) Texas - 9
12) Iowa - 8
13) Maryland - 8
TED Z
T206 Reference
.