With most of the off-season focus on the Chris Sale trade, it's easy to forget about another significant pitching acquisition made by Red Sox President of Baseball Operations Dave Dombrowski. On December 6th, Boston sent prospects Mauricio Dubon and Josh Pennington—along with Travis Shaw—to The Brew Crew for 28-year-old relief pitcher Tyler Thornburg. In his five seasons with Milwaukee, Thornburg has gone 14-9 with a 2.87 ERA. Part of last season he took on the closer's role and ended up 2016 going 8-5 with a 2.15 ERA—and 13 saves. He gave up just 38 hits in 67 innings pitched—and had a WHIP of 0.940. He also struck out 90 batters on the year. So, along with the returning Carson Smith (targeting mid-March for his first bullpen), Thornburg will offer some formidable set-up for closer Craig Kimbrel.