State College has been the Short Season A team for the St. Louis Cardinals since 2012. The new extension of the Player Development Contract runs through 2020. Both clubs have been able to benefit from the partnership in past years. This also means that every Redbird affiliation will continue after the year.
For more information, Ballpark Digest did a great job covering the extension. Here is the link. The same site also has a helpful page to follow every MiLB affiliation that might be changing.
State College Success
This organization has been around since 2006.