Blackburn and Dan Vogelbach were traded from the Cubs to the Mariners on Wednesday in exchange for Mike Montgomery and Jordan Pries, Bob Nightengale of USA Today reports.
While Blackburn hasn't displayed big swing-and-miss stuff in the minors (just 72 strikeouts in 102.1 innings this season), he's managed to post a sub-3.50 in every level of his minor league climb thus far. He's spent all of 2016 with Double-A Tennessee, and could be bound for the same level with the Mariners.