JUNE 16: The signing is now official, as Kopech’s father tweeted a photo of his son inking his first professional contract. MLB.com’s Jim Callis reports (via Twitter) that Kopech receives a $1.5MM bonus, meaning Boston saved about $178K on the selection.

JUNE 10, 2:30pm: Kopech says that he will sign for “a little under” slot, reports Alex Speier of WEEI.com. The bonus will land around $1.6MM, Cotillo tweets.

2:08pm: The Red Sox have an agreement in place with compensation pick Michael Kopech for an as-yet unknown amount, tweets Chris Cotillo of MLBDailyDish.com. Kopech was taken with the 33rd overall pick, which comes with a $1.678MM allotment.

Observers were largely in agreement on Kopech’s stock, with Baseball America (37th), ESPN.com’s Keith Law (40th), and MLB.com (41st) all placing him in the same range on their top prospect lists. The latter outlet noted that Kopech could clean up his delivery, but already has a strong fastball and curve and “has a lot of projection remaining.”

Kopech, who was committed to the University of Arizona, becomes the first reported draft signing for Boston. The club’s other top selection, shortstop Michael Chavis, was also taken out of high school.