Mike Trout, I'd say. I know I know heresy. But god is Harper good at this age. Imagine what he'll be like at 25...
It's not heresy, but if Harp makes the jump from 19 to 20 that Trout did, this won't be the case. Heck, he's been so much better at 19 than Trout was that he may not need to make a huge jump to match Trout.
