Texas offensive coordinator Joe Wickline is suing Oklahoma State claiming that he’s calling plays for the Longhorns and that Oklahoma State hasn’t fully released him from his contract with the school, according to Brian Davis with the Austin America-Statesman.

When Texas landed Wickline as coach, there was a clause in his Oklahoma State contract that stated he would have to buy out the remaining balance of his contract —Â $593,478 —Â if he took another job unless he was named offensive coordinator “with play-calling duties” or left for the NFL.

Oklahoma State athletic director Mike Holder has said that he doesn’t think Wickline is calling the plays, and actually sent multiple letters to Texas athletics claiming that Wickline didn’t have those play-calling duties necessary to avoid the buyout.

In the third such letter, Oklahoma State “claimed that coach Wickline was lying about his position,” and added that Texas gave Wickline “the misleading title of offensive coordinator.”

Texas assistant head coach Shawn Watson is considered by most to be the Longhorns' primary play-caller.

Wickline’s lawsuit has been filed in Travis County, and he is “requesting a jury trial,” per The Statesman.