Small forward
A 6' 4" Shooting guard/Small forward, Vega played for Oak Hill Academy, finishing the 1987–88 season with an average of 30.6 ppg, the highest single season scoring average in school history. Vega's highlights during that season included scoring 48 points against New Hampton School. For his performance that year, Vega was named the school's MVP. Also, during the 1988 Dapper Dan Roundball Classic, one of the nation's premier showcases for high school basketball talent, Vega earned the MVP trophy, beating out teammates, and future notable NBA players Alonzo Mourning, Chris Jackson, Billy Owens and Shawn Kemp. The opposing squad featured LaPhonso Ellis and Anthony Peeler. After the 1987–88 season, Vega was recruited by The University of Arizona and later transferred to Providence but never played. Instead, he returned to Puerto Rico and became a star on the island's professional circuit.