WWE has 700 full-time employees, with its wrestlers (arguably the most important as they create the content that drives the company) all at-will employed independent contractors who can be terminated at any time. The average career of an NFL player (a league where player contracts can also be terminated immediately) is three and one-half years. Comparatively, recently released WWE competitor Mason Ryan was signed in 2009 and released in 2014, giving him a five year run. As well, there's the case of similarly released Mexican lucha star Mistico, who as Sin Cara lasted with the company for three years. WWE careers like The Undertaker's 24-year run and John Cena's 14-year stint are rare. When owning a company that ultimately has to pay its employees a relatively lesser rate overall than other similarly sized entertainment companies (oftentimes due to high employee turnover limiting raises or pay increases), becoming a billionaire is inevitable.