Mariners trade for Red Sox left-hander Wade Miley

The Red Sox get Carson Smith and left-hander Roenis Elias. Aaron Gleeman at Hardball Talk says the following about Smith and Elias:

> Smith has quietly been one of the best setup men in baseball for the past two seasons, throwing 78 innings with a 2.07 ERA and 102/25 K/BB ratio. He’s another huge upgrade to a Boston bullpen that also added Craig Kimbrel to holdover Koji Uehara. Elias is a potentially useful 27-year-old starter, so the Red Sox seemingly did pretty well here.