Dolphinitis
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There's no big mystery going on. Jones quit on the team today.
The safety tandem was being rotated all day long to keep Minkah in. And when Jones was asked to leave the field as part of that rotation, he decided not to play again. It was not injury related, it was just a guy getting upset.
Hyde explains it in detail here: https://www.sun-sentinel.com/sports/miami-dolphins/fl-sp-hyde-dolphins-column-20181104-story.html
it says its NOT CLEAR if he pulled himself out because he was injured. my guess that it will turn out to be another of the mysterious injuries.