Such a deal does not come as a surprise, as the Indians are deep in fringe starters competing for a rotation spot while the Mariners have unexciting and limited options for their own rotation spot.
Laffey likely won't be handed a spot in Seattle and will have to fight for it, but the odds are high he will snag a spot. Laffey has a career 4.41 ERA in 320 1/3 innings. The 25-year-old has split time between the rotation and bullpen since debuting in 2007 and has made 49 total starts and appeared in 30 games out of the bullpen.
Laffey does not have good command (3.6 BB/9, but 4.3 over the last two seasons) and a poor strikeout rate at 4.4, but fringe left-handers are always welcome.
UPDATE: The Indians received cash considerations and Matt Lawson, who was a throw-in in last year's Cliff Lee deal with the Rangers. The 25-year-old may have a few stints as a backup infielder in the majors but that's about it.