Matt Tabor had entered the 2017 MLB amateur draft, the first one for Mike Hazen as GM of the Diamondbacks, with a bit of a drum roll because of some impressive results while pitching for the Milton Academy, a high school in Massachusetts.
He moved from shortstop to pitching just 3 years earlier, had a growth spurt and then enjoyed a velocity boost early in 2017 which caught the attention of MLB scouts. Sites like Baseball America and Fangraphs included him in their top 100 draft lists, with Baseball America moving him to 58 and Fangraphs to 70:
“Tabor weighed 150 pounds as a junior but has added weight and velocity over the last calendar year and has been up to 96 this spring while sitting around 93 with the fastball and he remains physically projectable.