From August 18 to August 19, 2007 the Continental Baseball League held its inaugural championship series at Robinson Stadium in Texas City, Texas. Three teams competed for the league's first CBL title:  

 

Ron Baron, league president and co-founder, is seen before the series started with the players who had earned various titles during the league's first regular season including batting champion and others. 

Here is more information about this first championship series for the independent professional baseball league, including videos from the games:

https://www.cblproball.com/championships/2007-cbl-championship/