Those 12 players will compete in Lithuania later this month and one player that made the final cut is Houston St. John's School wing Justise Winslow.
Winslow is among some of the best players and is not taking this opportunity for granted.
"It's an honor to be out here with all these great players trying to represent your country," said Winslow. "It's a privilege, but at the same time you have to work hard. Nothing is going to be given to you."
Being humble goes a long way at the US Olympic Training Center as it makes you work that much harder.
"It's serious work out here," Winslow said. "Everyone is competing for a spot and if you take one play off that could be the play that coaches remember you by. It's fun being out here with the top players.
"Some of these guys you'll get to see for a long time in college and maybe at the next level."
The 6-foot-6, 190-pound small forward has been doing a lot of traveling as of late as he is on the EYBL circuit with the Houston Hoops and attending various camps across the country. He has made time to take some unofficial visits this summer and the most recent visit was to Arizona two weekends ago.
The visit went well and Winslow went into great detail about the things he liked the most.
"I enjoyed it a lot," explained Winslow. "I got to hang out with the players and we watched the Eastern Conference Finals. The next day I got to see the academic side of it and things like that. It was a good visit, a good time."
The entire Arizona basketball team has not yet arrived in Tucson, but many of the guys were in attendance while Winslow was in town.
Winslow says Miller discussed national championships and how he fits into that plan.
"[Miller] thinks that, especially [class of 2014], once we get there then that will be the year for sure," said Winslow. "If they get all the right pieces then they should reach that next level for sure.
"It's good to hear stuff like that, but at the same time you have to stay humble. He likes me a lot and wants me to go there. He's recruiting me hard."
It is no secret that Winslow is high on the list of players that Arizona wants in the class of 2014 and as of this time in the recruitment, Winslow is very interested in the Wildcats as well.
"I'm pretty interested in it," explained Winslow. "It's a good program, a lot of good history, a lot of NBA Draft picks in recent years. Nice weather, good coaches and good players. It is definitely a good program."
The high interest does not mean that Winslow has any favorites at this point, as he will continue to take his time.
"Not really," said Winslow of having favorites. "I'm just taking a slow and real smooth approach to it. I will probably cut it down come fall."