Golden State Prep is Mining College Ball Gold

Golden State Prep (GSP) is a Napa, CA based post-graduate men’s basketball program. They originally worked in conjunction with Prolific Prep's coaching staff until Prolific moved its operations to Florida this past summer.  GSP is not a school. They are a training-based organization that players utilize during their gap year. Golden State Prep provides a program for high school graduated student-athletes who want an additional year to develop their basketball skills, mentality, and body in order to be best prepared for college basketball.

Golden State Prep runs two teams, Grey and Black, for much of its season. For some of their highest level competition, they combine the teams into a team they've named Golden State Prep Select. Last year, the combined team was computer ranked as one of the Top 25 prep teams in the nation.

The teams' 2025-26 game schedules and results can be found by clicking on the following links.

Golden State Prep Select      Golden State Prep Black   Golden State Prep Gray

The teams are coached by Humphrey Jackson II and Joseph Frank. We profile some of their 2025-26 players below.

BJ Gill (2026) 5'11point guard - From Houston, TX, Gill is a stud. He is electric, quick and can really shoot it. Gill is hard to keep out of the paint. He is a hawk as an on-the-ball defender. He is really maturing in his game and playing at a great pace right now. Has received D1 offers and is projected as a Mid Major level player.

Ashton McCullough (2026) 6'5 guard - From Southern California kid who was recently named the MVP of the Golden State Prep Classic. McCullough is a stat stuffer. He has blown away the GSP coaches with the improvement that he has made so far this year. He is now shooting the 3-ball at a good clip. McCullough is a great defender, who guards the opposing best guard. He gets paint touches on offense and rebounds with the best of them. Plays AAU with Dream Vision. Projected a s a Mid Major prospect.

Soprano Szelazek (2026) 6'8 small forward - From France, Szelazek is a ridiculously good passer for his size. He has an NBA Body and defends at high D1 level. He is super fundamental and can step on D1 floor right now and guard anyone. His stock is going to be rising now that he is finally healthy and so his best is on the come. He has tweaked his shooting mechanics and now shoots with confidence. He can play four positions. Has received a Mid Major D1 offer.

Alberto Mariuzzo (2026) 7'2, 250lb forward - From Italy, Mariuzzo is a massive player. He started playing basketball just two years ago. He is maybe the most improved player in 2.5 months than anyone GSP has ever had. He is a few years away, but he is learning leverage and technique, and he is a load to keep out of the lane. He is going to be a factor for a Mid Major once he fully develops his skill and conditioning.  He has official visits to Stanford and CAL upcoming.

Pietro Ranieri (2026) 6-10 forward - Ranieri plays for the Italian national team.  He is a very skilled stretch four and just needs more time in the USA competition to adjust. The most talented player in the GSP program. He is focused on Increasing his strength.  Has received D1 offers and is projected to be a great Mid Major prospect.

Max Hartman (2026) 7-0 forward   - From the Netherlands, Hartman played so well in the recent Golden State Classic, St Mary’s picked him out of everyone to potentially do an unofficial visit. He is another GSP player who has improved at the highest level. He really understands the physicality and mechanics of post players. He also can shoot the 3. He is a Low Major to Mid Major prospect who will continue to rise in portal once he gets in a program. Has a perfect attitude and wants to be special.

Bence laluska (2026) 6'6 shooting guard - laluska is a sniper and has the prettiest shot in the program. A D1 level shooter. He plays for the Hungarian National team. He needs to improve his IQ and defense to excel at the D1 level. He is projected to be a high D2/Low Major prospect, but will shoot the ball at a Mid to High Major level, 

Isaiah "Zip" Hines (2026) 6'0 point guard - From Michigan, Hines' basketball IQ and maturity have increased immensely. He is a dream teammate and distributor.  A gym rat who is as good as many current GSP alumni now playing in D1 ball. He is projected as a High D2 player who can play low D1 if he finds a coach who falls in love with him.

Micah Powell (2026) 6'5 wing - From Ann Arbor, MI, Powell is an elite shooter. He has a stocky body, sneaky athleticism, and can really shoot it. He needs to improve defensively and in his rebounding. He is projected to be a high D2 player and prospect.