As has become their annual unofficial tradition, the Rangers announced an early-season contract extension Thursday.

What is different: This time it's a deal with a minor league affiliate, not a young up-and-coming player.

The Rangers announced a two-year extension of its player development contract with Double-A Frisco, which was to open its 16th season Thursday against Tulsa at Dr Pepper Ballpark. The RoughRiders have been a Rangers affiliate since their inception. They will remain in the Rangers fold through at least 2020.

It's likely the relationship will last long past 2020, but a two-year extension is the maximum allowed by the agreement that governs the relationships between minor and major league clubs.