CrossFit is the hottest new workout routine of 2015, but is it as popular with professional athletes as it is with your average John and Jane Doe?

The answer is a little more nuanced than a simple 'yes' or 'no.' Although CrossFit hasn't completely obliterated and replaced the fitness regimens of America's athletes, it nevertheless is becoming more and more prevalent.

One famous NFL coach is such a believer in CrossFit that he introduced the exercise to his entire roster just a few seasons ago. And MLB, NBA, NASCAR, and soccer stars have also sworn by it.

Here are eight professional athletes who practice CrossFit.

(Citations for these athletes' CrossFit participation available here, here, and here).