The Intercept and First Look Media are bleeding talent these days.
Honestly, I didn't understand what John's role there could have been since Greenwald has said that he doesn't believe in editors.
UPDATE: Here's The Intercept's article, including a statement by John:
The Intercept's editor-in-chief, John Cook, who spent the year tripling our staff size and significantly increasing our daily journalistic output, is leaving at the end of the year to return to Gawker Media. Deputy Editor Ryan Tate will continue to work with John and the rest of the newsroom to effect a smooth transition until the search for Cook's permanent replacement, already underway, is completed.
"Working with my Intercept colleagues has been one of the most fulfilling things I've done in my career, and my decision to leave was a painful one to make," Cook said. "But I feel comfortable leaving in the knowledge that it is now perfectly situated to become a powerful journalistic force under new editorial leadership."
Because the first thing you want to do is leave a fulfilling job within the year.