The Phoenix Suns have officially signed their first round pick in the 2015 NBA Draft, Devin Booker, to a deal that could wind up being worth $10 million over four years. The signing was announced by the Phoenix Suns without disclosing terms, while Paul Coro of the Arizona Republic provided the contract details.

Booker, the No. 13 pick in this year’s draft, signed to a deal above the rookie scale, which is not unprecedented since there typically isn’t much wiggle room in negotiating starting deals with rookies. The Suns could have signed Booker for as little as 80 percent of the $1,773,200 rookie scale for the No. 13 pick in year one, or as much as 120 percent of that amount.

Per Coro, the Suns opted to give him the 120 percent, with Booker’s first-year salary coming in at $2.13 million. He’ll earn $2.22 million in his second season, with team options in year three ($2.32 million) and year four ($3.31 million).

At 18 years old, Booker has a ton of promise as one of the best shooters in his draft class. A 6’6″ shooting guard from Kentucky, Booker will help the league’s worst three-point shooting team (post-All-Star break) and if he can round out the other areas of his game, he’ll be another young, talented addition to Phoenix’s backcourt depth.

Booker has struggled with his shot so far in NBA Summer League, going 6-for-23 from the field and missing all eight of his three-pointers. But he’s still averaging 8.0 points, 4.5 rebounds and 1.5 steals per game through the first two games and his early struggles most likely amount to rookie jitters.

With a high basketball IQ, Booker’s maturity and ability to spread the floor makes him a great fit for the Suns, while also putting a little bit of pressure on Archie Goodwin to perform in 2015-16.