John Cena was recently interviewed by Complex and explained why he has become a "free agent" to appear on both Raw and SmackDown Live since returning on July 4th, here is his explanation:

"The reason that I wanted to be a free agent and the reason they kind of granted my request is because I don’t know if I’ll be available for Smackdown specific only or Raw specific only, and I also know that my days are numbered. I just turned 40 in April and we have so many young and talented performers, I don’t know how many years I have left. So in the time I have left, I’m gonna do what I can to dedicate to this company I just want to be able to do it the most time that I possibly can."