With grandparents who played college basketball, with a 6-11 father who was a 1,000-point scorer at Oregon State, with a 6-foot-4 mother who is fourth on the Beavers’ all-time blocks list, with a 6-7 older sister who is a junior center at Cal, Miles Heide was destined to be tall and to play college basketball.

And after Brian Dutcher first saw Heide in person last spring, the San Diego State head coach was determined that he play for the Aztecs.

“I’ve had a decent amount of recruitable kids over my career,” said Jason Griffith, the Mount Si High coach whose teams are perennial contenders for the Washington state title, “and I have never seen a head coach take the lead on a kid like this, ever. It’s usually the assistants who are lining everything up and calling and texting. Dutcher was lead the guy from the moment they saw him.

“That’s kind of a testament of how bad Dutcher wanted him in the program. I mean, they have been relentless. I have not seen a school recruit a kid as hard as they recruited Miles.”

All that work paid off Saturday afternoon, when the 6-9, 225-pound Heide committed to the Aztecs in an Instagram post and joined Modesto Christian guard BJ Davis in a two-man prep recruiting class of players with similar career arcs.

Both play for teams that reached the state championship game last season. Both are gym rats. Both played JV as freshmen. Both are late bloomers. Both are currently on steep upward trajectories.

“Each player takes a different path,” said Heide, who doesn’t turn 18 until May 31. “Some guys develop earlier in their career, in middle school, and they fall off. I always knew I would develop later. It was just a question of when.”

Said Griffith, his high school coach: “Everyone overlooked him when he was younger, when he was seventh, eighth, ninth grade. He was never one of the top kids. You had a lot of guys who doubted him. To his credit, he just kept chipping away at it. Where we saw the biggest jump was from March to May. My skill development guy would call me every week or two and say, ‘Everything we talked about, this is it. This is the time where Miles is taking off.’”

Heide was a key cog last season at Mount Si (28 miles east of Seattle), averaging 14.5 points and 10.1 rebounds on a 25-1 team that lost in overtime in the 4A state championship game. But what caught the Aztecs’ attention is what he did at the Section 7 recruiting event in Arizona last June for the West’s top teams: 21.5 points, 19.5 rebounds, 3.0 blocks.

It was more than the numbers, though. Heide played almost exclusively in the low post last season for Mount Si and — true story — didn’t attempt a single jump shot, relying on hooks, put-backs and dunks for his points. Every time the SDSU coaches saw him this spring and summer, he had added another dimension to his offensive game: an elbow jumper, a lethal fade-away, 3-point range.

“It’s been a big addition to my game the past three or four months,” said Heide, who was already proficient at scoring over both shoulders from the block. “Before Section 7, I really didn’t have a jump shot or a fade-away or a 3. It’s the work that I put in, something I’ve been developing over time. I’m not fully there yet. It’s a long process, and I’m willing to take it.”

Bigs typically take longer to develop than perimeter players, particularly when they’re still growing at a rapid rate (Heide, who has size 16 feet, says he’s expected to sprout up another inch or two) and waiting for hand-eye coordination to catch up. But if anyone knows that, it’s the Heides.

“It’s helpful to have them as parents because they understand the process, they understand the kind of work you have to put in,” Miles said of Jason and Sissel, Oregon State alums. “It’s also helpful to have my sister (Sela at Cal), to see her process. There’s a lot of experience that’s happened in front of me that’s been passed down.”

Heide also visited Washington State and was pursued by Colorado, Utah and Iowa. He chose SDSU, he said, for the relationships with the coaches, the winning tradition, the playing style and the blue-collar ethic of the players.

“The team is full of hard workers who are constantly in the gym,” Heide said. “They target guys who work hard. I like that.”

Heide and Davis both fill needs for next year’s roster — a big to replace departing posts Nathan Mensah and Aguek Arop, and a scoring guard with Matt Bradley and Adam Seiko in their final seasons of eligibility. The only other high school senior invited on an official visit was 6-7 Harvard Westlake wing Brady Dunlap, who picked Notre Dame over the Aztecs.

SDSU is not expected to pursue anyone else before the early letter of intent window in November. That leaves the transfer portal and unsigned high school seniors for the spring recruitment period. SDSU will have at least three additional available scholarships for 2023-24.

Dutcher isn’t allowed to comment publicly on recruits until they sign a letter of intent. But those close to him say he is over-the-moon excited about landing Heide, whom Griffith expects to be 6-10, 240 by the time he arrives on campus.

“The Iowa coach called me after Section 7 said, ‘Coach, we don’t recruit a lot of kids from Washington, I’m going to be honest. But is this kid as good as I saw?’ ” Griffith said. “I was like, ‘He is that good.’ … I’ve been telling coaches for two years: ‘I’m not the lucky one. The lucky one is going to be who gets him.’”