Tony Gwynn was recently featured in a short video describing his experiences when visiting Bethpage Park, home of the Long Island Ducks (Atlantic League):
According to the article, Gwynn was there to visit his son-in-law, Kennard Jones, who plays for the Ducks.
There are several good books about the independent professional baseball leagues. You are welcome to see a list of suggestions through this link: Books Get notified of upcoming independent baseball tryouts from either of these services: first service or the second service. Prospective players can find some helpful resources here We will be providing a growing list of possibly helpful tips and suggestions on various baseball information. This will range from "how to" information about baseball skills all the way to helpful information for casual baseball fans. Please click the link for more information: Tips And How To Information