Mariners acquire LHP Wade Miley, RHP Jonathan Aro from Boston

Send Red Sox RHP Carson Smith and LHP Roenis Elias.

Seattle Mariners Executive Vice President & General Manager of Baseball Operations Jerry Dipoto today announced from the Baseball Winter Meetings that the Mariners acquired left-handed pitcher Wade Miley and right-handed pitcher Jonathan Aro from the Boston Red Sox in exchange for right-handed pitcher Carson Smith and left-handed pitcher Roenis Elias.
"Wade is a proven Major League starter who brings a level of stability to the middle of our rotation," Dipoto said.
Miley, 29, was 11-11 with a 4.46 ERA in 32 starts for the Red Sox in 2015. He threw 193.2 innings, the fourth consecutive season he's pitched in 32 games or more and tossed at least 193.0 innings. In his first AL season in 2015, he led the Sox in wins, starts, innings and quality starts (17). Miley is 1 of 4 lefties (and 13 pitchers overall) to have made at least 32 starts in each of the last 3 seasons from 2013-15. His 98 starts since the beginning of 2013 are the most by a left-handed pitcher and tie-third overall in the Majors. While his 127 starts since 2012 are 4th-most in the Majors amongst left-handers behind only Jon Lester (130), Mark Buehrle (128) & Madison Bumgarner (128).
Named an All-Star in his first full season with Arizona in 2012, Miley is 49-46 with a 3.95 ERA (365 ER/832.1 IP) in 138 career appearances (134 starts) between the Diamondbacks and Red Sox. 
Aro, 25, made his Major League debut with Boston on June 25 vs. Baltimore and went 0-1 with a 6.79 ERA (8 ER, 10.1 IP) in 6 relief appearances over four stints with the Red Sox in 2015 (June 25-July 2, July 30-31, Aug. 23-25 & Sept. 8-end of season). The right-handed reliever combined to go 3-3 with 2 saves and a 3.04 ERA (25 ER, 74.0 IP) in 34 relief appearances combined between Double-A Portland and Triple-A Pawtucket.
Aro was originally signed by Boston as an international free agent in 2011. The Dominican Republic native is 16-15 with 13 saves and a 2.83 ERA (95 ER, 301.2 IP) in 101 games, 12 starts over five seasons on the minor leagues.
Smith, 26, went 2-5 with 13 saves and a 2.31 ERA (18 ER, 70.0 IP) in 70 games with the Mariners in 2015. The right-handed reliever, limited opponents to a .194 (49x252) average in his first full season in the Major Leagues. Smith was originally selected in the 8th round of the 2011 MLB First-Year Player Draft out of Texas State University. Over parts of two seasons in the Majors he is 3-5 with a 2.07 ERA (18 ER, 78.1 IP) in 79 appearances.
Elias, 27, went 5-8 with a 4.14 ERA (53 ER, 115.1 IP) in 22 games, 20 starts over two stints with the Mariners in 2015 (April 26-July 3 & Aug. 23-end of season). He also made 12 starts with Triple-A Tacoma, going 4-2 with a 7.34 ERA (50 ER, 61.1 IP). The left-handed pitcher from Cuba was originally singed Seattle as a minor league free agent on May 3, 2011. Over two Major League season, he is 15-20 with a 3.97 ERA (123, 279.0 IP) in 51 games, 49 starts.
With today's transactions the Mariners 40-man roster remains at 39 players.