Major league teams sign two or four year agreements called Player Development Contracts (PDC) with minor league teams. These are renewed in even years, so in September of the even number year seasons, you will often see many minor league teams switch affiliations.

This list indicates when the Player Development Contract for each minor league team is set to expire, for A level baseball only.

California League (A - Advanced)

Lake Elsinore Storm - San Diego (signed through 2018)

Lancaster JetHawks - Colorado (signed through 2018)

Modesto Nuts - Seattle (owned by Seattle)

Rancho Cucamonga Quakes - Los Angeles (signed through 2018)

San Bernardino Inland Empire 66ers - Anaheim (signed through 2018)

San Jose Giants - San Francisco (owned by San Francisco)

Stockton Ports - Oakland (signed through 2020)

Visalia Rawhide - Arizona (signed through 2018)

 

Carolina League (A - Advanced)

Buies Creek Astros - Houston (owned by Houston)

Carolina Mudcats - Milwaukee (signed through 2018)

Down East Wood Ducks - Texas (owned by Texas)

Frederick Keys - Baltimore (signed through 2018)

Lynchburg Hillcats - Cleveland (signed through 2018)

Myrtle Beach Pelicans - Chicago (NL) (signed through 2020)

Potomac Nationals - Washington (signed through 2018)

Salem Red Sox - Boston (owned by Boston)

Wilmington Blue Rocks - Kansas City (signed through 2018)

Winston-Salem Dash - Chicago (AL) (owned by Chicago (AL))

 

Florida State League (A - Advanced)

Bradenton Marauders - Pittsburgh (owned by Pittsburgh)

Charlotte Stone Crabs - Tampa Bay (affiliated through 2018, do not know contract status)

Clearwater Threshers - Philadelphia (owned by Philadelphia)

Daytona Tortugas - Cincinnati (signed through 2018)

Dunedin Blue Jays - Toronto (owned by Toronto)

Florida Fire Frogs - Atlanta (signed through 2020)

Fort Myers Miracle - Minnesota (signed through 2018)

Jupiter Hammerheads - Miami (owned by Miami)

Lakeland Flying Tigers - Detroit (owned by Detroit)

Palm Beach Cardinals - St. Louis (owned by St. Louis)

St. Lucie Mets - New York (NL) (owned by New York (NL))

Tampa Yankees - New York (AL) (owned by New York (AL))

 

Midwest League (A)

Beloit Snappers - Oakland (signed through 2018)

Bowling Green Hot Rods - Tampa Bay (signed through 2018)

Burlington Bees - Anaheim (signed through 2018)

Cedar Rapids Kernels - Minnesota (signed through 2020)

Clinton Lumber Kings - Seattle (signed through 2018)

Dayton Dragons - Cincinnati (affiliated through 2018, do not know contract status)

Fort Wayne TinCaps - San Diego (signed through 2018)

Great Lakes Loons - Los Angeles (signed though 2018)

Kane County Cougars - Arizona (signed through 2018)

Lake County Captains - Cleveland (signed through 2018)

Lansing Lugnuts - Toronto (signed through 2018)

Peoria Chiefs - St. Louis (signed through 2020)

Quad Cities River Bandits - Houston (signed through 2018)

South Bend Cubs - Chicago (NL) (signed through 2020)

West Michigan Whitecaps - Detroit (signed through 2020)

Wisconsin Timber Rattlers - Milwaukee (signed through 2020)

 

South Atlantic League (A)

Asheville Tourists - Colorado (signed through 2018)

Augusta GreenJackets - San Francisco (signed through 2018)

Charleston Riverdogs - New York (AL) (signed through 2020)

Columbia Fireflies - New York (NL) (signed through 2018)

Delmarva Shorebirds - Baltimore (signed through 2018)

Greensboro Grasshoppers - Miami (signed through 2018)

Greenville Drive - Boston (signed through 2020)

Hagerstown Suns - Washington (signed through 2018)

Hickory Crawdads - Texas (signed through 2018)

Kannapolis Intimidators - Chicago (AL) (signed through 2018)

Lakewood Blue Claws - Philadelphia (signed through 2020)

Lexington Legends - Kansas City (signed through 2018)

Rome Braves - Atlanta (owned by Atlanta)

West Virginia Power - Pittsburgh (signed through 2018)

 

NY-Penn League (A - Short Season)

Aberdeen IronBirds - Baltimore (signed through 2018)

Auburn Doubledays - Washington (signed through 2018)

Batavia Muckdogs - Miami (affiliated through 2018, do not know contract status)

Brooklyn Cyclones - New York (NL) (owned by New York (NL))

Connecticut Tigers - Detroit (signed through 2018)

Hudson Valley Renegades - Tampa Bay (affiliated through 2018, do not know contract status)

Lowell Spinners - Boston (signed through 2018)

Mahoning Valley Scrappers - Cleveland (signed through 2018)

State College Spikes - St. Louis (signed through 2018)

Staten Island Yankees - New York (AL) (owned by New York (AL))

Tri-City ValleyCats - Houston (signed through 2018)

Vermont Lake Monsters - Oakland (signed through 2018)

West Virginia Black Bears - Pittsburgh (signed through 2018)

Williamsport Crosscutters - Philadelphia (signed through 2018)

 

Northwest League (A - Short Season)

Boise Hawks - Colorado (signed through 2018)

Eugene Emeralds - Chicago (NL) (signed through 2018)

Everett AquaSox - Seattle (signed through 2020)

Hillsboro Hops - Arizona (signed through 2018)

Salem-Keizer Volcanoes - San Francisco (signed through 2018)

Spokane Indians - Texas (signed through 2018)

Tri-City Dust Devils - San Diego (signed through 2018)

Vancouver Canadians - Toronto (signed through 2018)

 

Appalachian League (Rookie - Short Season)

Bluefield Blue Jays - Toronto (affiliated through 2018, do not know contract status)

Bristol Pirates - Pittsburgh (owned by Pittsburgh)

Burlington Royals - Kansas City (signed through 2020)

Danville Braves - Atlanta (owned by Atlanta)

Elizabethton Twins - Minnesota (owned by Minnesota)

Greeneville Astros - Houston (owned by Houston)

Johnson City Cardinals - St. Louis (owned by St. Louis)

Kingsport Mets - New York (NL) (owned by New York (NL))

Princeton Rays - Tampa Bay (owned by Tampa Bay)

Pulaski Yankees - New York (AL) (affiliated through 2018, do not know contract status)

 

Pioneer League (Rookie - Short Season)

Billings Mustangs - Cincinnati (signed through 2018)

Grand Junction Rockies - Colorado (owned by Colorado)

Great Falls Voyagers - Chicago (AL) (signed through 2018)

Helena Brewers - Milwaukee (signed through 2018)

Idaho Falls Chukars - Kansas City (signed through 2018)

Missoula Osprey - Arizona (signed through 2020)

Ogden Raptors - Los Angeles (signed through 2018)

Orem Owlz - Anaheim (signed through 2018)

MLB teams have started to move into more ownership of their own A level teams,this will affect independent level A ball leagues, another example of cities moving away from independent A ball teams can be found in conversations in Amarillo, Lubbock if they decide to entertain a new ball park and others want an affiliated organization currently in Wichita Kansas the Wingnuts a team with rich history when it comes to being a winner on the field have been left out of conversations about a new ball park, the mayor of that city is attempting to find a AA or AAA team to play in the stadium he stated that[ players have a clearer ,more direct path to the majors. Independent players,while experienced,are often playing out their last months or years as professionals.]

The Wingnuts are part of the American Association independent A ball league, this being the argument made by most cities when looking to build a stadium for future use,the Wingnuts average attendance in 2016 was 3,080 for 49 home dates this number is above the average attendance numbers for most minor league organizations, but its not enough for the city of Wichita the mayor has placed his bet on affilliated baseball.

Indy baseball attempts to sell its prospect players contracts to affilliated teams but this model is being pressured out of baseball,by MLB teams owning more A ball teams themselves.

The RDB academy Texas Independent Baseball League u21 does not sell player contracts, we instead are operating with a futurist concept of contract to hire model and have moved into the direction MLB is moving with academies that develop young prospect level talent.