He didn't really platoon last year. He spent most of the time starting in the minors. Then platooned for 2 months and finally started nearly everyday down the stretch. I don't have a problem introducing a guy as a platoon hitter for 20-30 games, especially when he's not an elite prospect. I do have a problem with bringing up a rookie to face only LHP because there's way too much down time involved. Fortunately, Murton handled it well, but that doesn't mean it was smart. I don't believe a rookie should be promoted until the manager is prepared to let him face righties at least some of the time.