Charlie Strong (USATSI)
Charlie Strong will be a witness in the trial between Oklahoma State and Texas' OL coach. (USATSI)

Texas coach Charlie Strong and quarterback Tyrone Swoopes are among those being called as witnesses in Oklahoma State's breach of contract suit against Texas offensive line coach Joe Wickline. 

Oklahoma State's suit claims that Wickline owes the school $600,000 for breach of contract, alleging he made a lateral move to Texas rather taking a promotion that included "play-calling duties." 

Strong has already been deposed and said that Wickline and associate head coach Shawn Watson shared play-calling duties in 2014, but he will face new questions at trial. Swoopes will also be brought in as a witness to testify on his interactions with the staff and which coach or coaches held play-calling duties in 2014. 

Along with Strong and Swoopes, Watson, assistant Jay Norvell, former Texas athletic director Steve Patterson and associate athletic director Arthur Johnson will also be witnesses. 

The University of Texas has not been named in the suit; Patterson, while AD, said the school would not get involved.