No. 50: Dustin Peterson, San Diego Padres
Jonathan Mayo of MLB.com notes, "He has a short, compact swing and a ton of bat speed. The ball jumps off his bat, and he has the chance to hit for both average and plenty of power." He also has a very advanced approach for a high school hitter and that should help him overcome the transition to pro ball.
There are questions about where Peterson will play in the pros. Ideally, he would be able to play second where his bat would profile better, but he should be able to hit for enough power that third base would also work.
No. 51: Blake Taylor, Pittsburgh Pirates
Keith Law on Taylor:
Taylor sits at 89-91 with a little natural cut on the pitch, and has touched 94-95 this spring, with the potential to end up in the 92-94 range once he fills out. The separator for him is that he can spin a breaking ball
No. 52: Justin Williams, Arizona Diamondbacks
Jonathan Mayo described Williams as follows: he "has tremendous raw power... but he's still raw and will still be only 17 on Draft day."
No. 53: Andrew Knapp, Philadelphia Phillies
Keith Law of ESPN on Knapp:
He's a solid receiver with a quick release and above-average arm strength, although he'll have to show he can handle better-quality stuff than what he's had to handle this spring. His swing has good rotational action, but he strides early and gets his weight out front, finishing by rolling over his front foot, which will limit his power output.
No. 54: Devin Williams, Milwaukee Brewers
Williams started to shoot up draft boards last fall when he flashed the ability to consistently hit 89-92 mph with his two-seam fastball. Williams also throws a four-seam fastball, and can approach 95 mph with the pitch. The prep player is currently 6'3, 172 pounds, leaving him some room to fill in his frame and potentially add more velocity.
Although Williams has a high ceiling, Jim Callis of Baseball America notes that the right-hander's shaky mechanics and command held Williams back on some draft boards. Williams also throws a low-80s slider and a sinking changeup, but does not currently throw either pitch with consistency.