The Astros' Player Development Agreement with Short Season A Tri-City expires at the end of the 2012 season. Here is a look at the Short Season A affiliates who at this time are scheduled to become available this off-season.
(AAA Player Development Agreement Update)
(High A Player Development Agreement Update)
(Low A Player Development Agreement Update)
Who's Up for Renewal?
New York-Penn League
Houston has been affiliated with Tri-City of the NYPL since 2001.
Aberdeen Iron Birds- affiliated with Baltimore since 2002. Operated by Ripken Baseball, LLC.
Batavia Muckdogs- affiliated with St. Louis since 2007. Operated by Red Wings Management, LLC.
Hudson Valley Renegades- affiliated with Tampa Bay since 1996. Operated by Keystone Baseball Club, Inc.
Jamestown Jammers- affiliated with Miami since 2002. Operated by Rich Baseball Operations.
State College Spikes- affiliated with Pittsburgh since 2007. Operated by Spikes Baseball, LLP.
Tri-City Valley Cats- affiliated with Houston since 2001. Operated by Tri-City ValleyCats, Inc.
As far as I can tell, the Astros have never had an affiliate in the Northwest League.
Boise Hawks- affiliated with Chicago Cubs since 2001. Operated by Boise Baseball, LLC.
Eugene Emeralds- affiliated with San Diego since 2001. Operated by Elmore Sports Group, Ltd.
Yakima Bears- affiliated with Arizona since 2001. Operated by Short Season LLC.