Memphis seems to be the only source rebutting these stories. In every article to the contrary the source of information has come from Memphis’s front office.

Suing and arbitration isn’t a huge discrepancy. Different process to resolving a legal dispute. Arbitration is an interesting approach by Rubio’s camp. Typically an arbitrator will ask for an conciliation from both sides, which maybe is all that Rubio’s seeking (to slightly lower the price). However, in US law it’s much more difficult to go back and sue if the arbitrator comes to an unsatisfying conclusion.