The Washington Nationals' relievers are having a stellar season. The group ranks sixth in the big leagues with 32 saves and has helped Washington lower its collective ERA to a major league-leading 3.20

So, what's the secret to the Nationals' pitching prowess this year? "Fifty Shades Of Grey," duh.

Major League Baseball released a video on Thursday of four members of the Nationals bullpen sharing their love for the wildly popular erotic novel. Sean Burnett, Ryan Mattheus, Tyler Clippard and Craig Stammen deliver an exceptional performance in this video.

I've always wondered what relief pitchers do with all that time in the bullpen. Mystery solved.

-- Follow Robbie Levin on Twitter @RobbieLevin.

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