Red Sox Trade Miley/Aro to Mariners for Carson Smith/Roenis Elias

The Red Sox have traded Wade Miley and Jonathan Aro to the Mariners for right-handed reliever Carson Smith and lefty starter Roenis Elias.

David Schoenfield, ESPN:

After earlier acquiring Craig Kimbrel from the Padres, they've now added Smith, a right-hander who dominated in his first season in the majors, with a 2.31 ERA, 92 strikeouts in 70 innings and just two home runs. With a low arm slot and his fastball/slider combo, Smith gets a lot of movement and sink on his pitches and crushed right-handers, who hit just .169/.248/.254 against him; lefties weren't much better with a .227/.315/.273 line. He's not a big name, but he's very good.

Elias has started the past two seasons for the Mariners, but command issues mean he'll probably never develop into anything more than back-of-the-rotation starter. But his fastball/curveball/changeup repertoire means he could profile well in the bullpen, especially if his 91-92 mph fastball plays up in relief.