These days the Mariners seem to be looking to play more to their ballpark's strengths--it's pitcher-friendly--and Dyson's excellent speed and defense make him a perfect fit for that approach. He stole 30 bases in only half a season's worth of at-bats with the Royals last season (299) and projects as Seattle's new starting left-fielder. He might also compete for the leadoff role in Seattle, though there are other candidates.

Karns has shown the ability to strike batters out at the major league level--270 over 265.1 career innings--and is a solid depth piece for Kansas City's rotation. The Royals will probably try him out as their much-needed No. 5 starter, but he has the ability to be a long man out of the 'pen as well. He's a solid risk-reward type of acquisition for KC, which made Dyson expendable after acquiring outfielder Jorge Soler from the Cubs.

Both of Dyson and Karns should be more appealing fantasy-wise after this trade than they were before it. Dyson looks like he'll be a mostly everyday starter for Seattle, and if so he'll be among the majors' top base-stealing threats (although that's probably his only fantasy appeal). Consider him a late-to-mid-round draft option. Karns is less appealing, but may be a solid sleeper if he can nail down a rotation spot and keep striking guys out. On Seattle's roster, Guillermo Heredia loses a lot of '17 fantasy potential with the arrival of Dyson (since Heredia moves from possible starter to likely fourth outfielder); meanwhile on the KC side of things, rotation option Chris Young probably loses any fantasy value he may have retained after last season's drop-off.