Let's play a quick game. I am going to put down two projection lines for two pitchers in the AL for 2016. The stats are from Baseball Reference.
Pitcher A
9-10 | 4.27 ERA | 177 IP | 145 K | 1.362 WHIP | 7.4 K/9
Pitcher B
7-9 | 4.02 ERA | 132 IP | 115 K | 1.303 WHIP | 7.8 K/9
Pitcher A is Wade Miley. Pitcher B is Roenas Elias. And this is why yesterday's deal may have been a steal for Boston.
I am not going to deny that I was hoping Miley would stay in Boston. He was the only free agent Boston signed last year to give the Sox exactly what they expected. He was a solid back-end starter who ate up innings. The only reason Boston's bullpen didn't completely burn out last year was that Miley averaged six innings a start.
But that also made Miley a valuable trade chip. He's cheap money for the next two years, reliable and under 30. So to flip Miley to Seattle for Carson Smith made a lot of sense.
Carson Smith has the potential to give Boston a 1-2 punch for the next three years like the Yankees had with Betances and Miller. Last year Smith posted a 2.31 ERA, 13 saves, 22 holds and a 1.01 WHIP while striking out 90 batters over 70 innings. And while that may not be how Boston starts the year (I can't see them kicking Uehara back as a 6th/7th inning guy yet) don't be surprised if it happens by mid-season.