After the end of his senior season at Cincinnati, Vaughn was automatically eligible for the 2010 NBA draft, where he went undrafted. In August 2010, Vaighn signed a professional contract with the Polpharma Starogard Gdański of the Polish Basketball League. In his first season with the club he averaged 11.6 points, 4 rebounds and 3.5 assists in 29 minutes per game during the regular season; he also played 8 games during the Polish Basketball Cup, averaging 10.3 points per game. His team won the Polish Cup that year, beating Anwil Włocławek in the final game, 75–67.
