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Clayton Christy/Lakeside Athletics

First Round (No. 16 Overall): Corbin Carroll, OF, Lakeside HS (Wash.)

Carroll has a 60-grade hit tool, 70-grade speed and the defensive instincts to be a standout defensive center fielder. That package of tools makes it easy to overlook his 5'11", 161-pound frame, and while he will never be a major power threat, he packs some sneaky pop into his undersized frame. MLB.com compared him to Jacoby Ellsbury and pegged him as someone who could grow into his power in the pros.

Grade: A

The D-backs have been a popular landing spot for Carroll in mock drafts and this pick kicks off what will be a busy Day 1 for Arizona. He was the best high school bat on the board here and there was talk he could go as high as No. 11 to Toronto, so this was a good get for Arizona.

First Round (No. 26 Overall): Blake Walston, LHP, New Hanover HS (N.C.)

A rail-thin 6'4", 172-pound left-hander with an extremely projectable frame, Walston could "easily add 30-40 more pounds in the future" according to Baseball America. He already sits in the low 90s with his fastball and can spin one of the better curveballs in this year's high school class. He also starred as a quarterback for his football team, which limited his exposure on the showcase circuit. A strong commitment to North Carolina State is expected to make him a tough sign.

Grade: A

If the Diamondbacks can get him signed, this is an excellent pick. He's going to be a project, but he has enough current stuff and feel for pitching that his upside is not completely reliant on physical projection. That said, this pick is all about the ceiling.

FA Comp Pick (No. 33 Overall): Brennan Malone, RHP, IMG Academy

Malone rivals Jackson Rutledge for the best pure stuff in this year's class. His fastball was touching the upper 90s late in the spring, and his slider is already a plus pitch. He doesn't offer as much projection as some of the other prep arms, but his present stuff makes that easy to overlook. With elite athleticism and clean mechanics, he just needs to refine his secondary stuff and improve his overall command.

Grade: A

Arizona continues to put their hefty bonus pool to good use, grabbing one of the most electric arms from this year's high school ranks. Their three picks so far have been all about ceiling, and that's the right plan of attack when you're picking early and often. Eventually, they'll need to find some savings somewhere.

FA Comp Pick (No. 34 Overall): Drey Jameson, RHP, Ball State

A draft-eligible sophomore, Jameson has racked up 243 strikeouts in 163.2 innings during his two seasons at Ball State. He can reach back and hit 98 mph on his fastball while pitching deep into games, and he backs it with a hammer curveball and a sweeping slider that both flash plus. The questions revolve around his undersized 6'0", 165-pound frame and whether he can handle a starter's workload. There's a ton of late-inning upside if he does eventually move to the bullpen.

Grade: B

Jameson has a high floor thanks to his late-inning profile as a reliever, and this looks like an opportunity to save some money against the slot value. Nice pick to round out the four early selections.

Second Round (No. 56 Overall): Ryne Nelson, RHP, Oregon

A two-way player during his first two seasons at Oregon, Nelson turned his full attention to the mound this spring and continued to impress. His fastball consistently sits at 99 mph, and his hammer curveball is a lethal strikeout pitch. Spotty command and a middling changeup make him a prime candidate for the bullpen, and he could be on the fast track if he starts his pro career in such a role.

Grade: B+

There's a good chance the D-backs will go the college route with the rest of their Day 1 picks since they will need to save some cash somewhere along the way. Grabbing one of the best fastballs in the draft is as good a strategy as any here in the second round.

Balance Round B (No. 74 Overall): Tommy Henry, LHP, Michigan

Henry has gone through some ups and downs this spring, looking like one of the best college pitchers in the nation when he's on and a fringe Day 1 pick when he doesn't have his premium stuff. At his best, his fastball touches 94 mph with a high spin rate, and his changeup and slider are both plus complementary offerings. With a durable 6'3" frame and the potential for three quality pitches, there is middle-of-the-rotation upside here if he can find more consistency.

Grade: B+

Henry's another risk-reward college arm who should allow the D-backs to save money to put toward their early selections. There was a time when it looked like he might sneak into the back of the first round, so this is a risk worth taking.

Balance Round B (No. 75 Overall): Dominic Fletcher, OF, Arkansas

The younger brother of Los Angeles Angels infielder David Fletcher, Dominic has a similar profile where the whole is greater than the sum of his parts. He's a standout defender in center field, and that could be his ticket to the big leagues. His left-handed swing could use some work, but he shows enough offensive promise to at least profile as a fourth outfielder with the potential for more.

Grade: B

Just as I expected, they took college players with four straight picks after grabbing three high-ceiling high schoolers early. There should be enough flexibility in the bonus pool to sign all seven of their Day 1 picks.