WWE does not hire just anyone. An applicant must be the right candidate if a candidate wants to become a WWE wrestler. WWE generally looks for healthy athletes. This also includes athletes who have a professional background. In fact, people who have served in the military are also preferred as well. If a candidate has experience related to MMA, then it would serve as a bonus point as well. Many WWE wrestlers like Brock Lesnar have experience and great background when it comes to UFC.