20. New York Mets: David Peterson, LHP, Oregon
This is a case of my trying to make the best fit for the overall puzzle. Peterson is probably too good to fall this far, as multiple sources have connected him to both the Astros (who hold the No. 15 pick) and the Yankees (No. 16), but the same can be said about the picks I’ve attributed to them, and something has to give. So even though junior college righty Nate Pearson of the College of Central Florida has been connected to the Mets in multiple mocks, the guess here is that New York will go with Peterson.
There's certainly plenty for the Mets to like in the 6'6", 240-pounder, whose stock has been rising this spring. On April 28 Peterson struck out 20 Arizona State hitters, the highlight of a year in which he went 11-4 with a 2.51 ERA. He offers a 90-94 mph fastball, a slider that flashes plus, an average (or better) changeup and a get-me-over curve, delivered with plus command thanks to a delivery that's been reworked since he headed to college in 2014.