The Rays selected Hopkins' contract from Triple-A Durham on Saturday, Marc Topkin of the Tampa Bay Times reports.
Hopkins spent most of the season working in the rotation at Durham, but after struggling as a starter, the team moved him to the bullpen in August. Now that he's pitched six consecutive shutout innings at Triple-A as a reliever, the 24-year-old righty will join the big club to help bolster the Rays' bullpen. He'll be making his MLB debut whenever he gets into a game.