The Dodgers extended their affiliation agreements with Triple-A Oklahoma City, Double-A Tulsa and low Single-A Great Lakes on Wednesday.

Minor league affiliation agreements last two years at a time. Each affiliation agreement was set to expire at the end of this season.

In the case of Triple-A Oklahoma City, the announcement was a formality. The Oklahoma City Dodgers are owned by the Los Angeles Dodgers and Mandalay Baseball Properties, which was founded by Dodgers co-owner Peter Guber.

Tulsa is in its second season as a Dodgers affiliate, while Great Lakes is in its 10th.

“We’re tremendously excited about extending our Player Development Contracts with Great Lakes, Tulsa and Oklahoma City,” Gabe Kapler, the Dodgers’ director of player development, said in a statement. “We are excited to see our relationship with these great franchises continue to blossom and are especially grateful for the leaders we’ve gotten to work with at each affiliate, as they have been an integral part of our development of the young men in the Dodger organization. We are honored to participate in this process with each partner and know we will continue to see strong returns from these relationships.”