Seattle and Toronto swapping Brandons: Morrow for League in the works

FOXSports.com’s Ken Rosenthal reports that the Mariners “have reached a tentative agreement” to trade Brandon Morrow to the Blue Jays for Brandon League and an unnamed prospect. Morrow being on the move is no surprise given that he’s been the subject of trade rumors all offseason, but the assumption had been that the Mariners would deal him for a hitter. Instead they’ll get League, a fellow right-hander who posted a 4.58 ERA in 74.2 innings out of the Blue Jays’ bullpen in 2009. While that ERA isn’t impressive, he’s a 26-year-old ground-ball machine with a mid-90s fastball whose 76/21 K/BB ratio suggests that his performance warranted a 3.58 ERA more than a 4.58 ERA. League has a chance to be a dominant late-inning reliever, but because Morrow has similar upside with the added bonus that he may still end up sticking in the rotation presumably the prospect going from Toronto to Seattle has considerable value as well.