Here is a story of how one player got some advice and ended up going to an independent baseball league when his college career was finished:  http://www.jimmyscottshighandtight.com/node/791

Note, however, that for the independent leagues you do not need an agent.  While an agent may help, you also can do well for yourself by contacting the individual independent baseball teams and finding out tryout dates.

Also, be sure to have all of your paperwork in order including references, stats, video footage (preferably on a video-sharing site so that you can send a link directly to the manager or director of player operations), and any other documentation such as any evaluations you may have had from a Major League scout.

If you want more information on becoming an independent baseball player then leave a comment on this blog, and I will respond to the questions as they are asked.