Johnson, a 6-foot-2 guard from Christ The King High School in Middle Village, New York, recently committed to Duquesne after having quite a bit of interest pick up in him late in the basketball year.
Nebraska and Central Michigan were also schools that came in late in Johnson's recruiting process.
Sean previously had expressed serious interest also in Manhattan, Quinnipiac, Northeastern, Iona, and Marist.
Johnson is a player who showed the ability to produce points in several spots on the floor. His perimeter game improved over the past year while his strength in finishing in traffic made him difficult to guard.
"I'm just going to work as hard as I can to earn playing time," said Johnson. "I want to be able to contribute and help the team win games. I'm used to winning. So I'll do whatever it takes to help my team win."
Johnson had a great experience playing inside Madison Square Garden at the Jordan Brand Classic last month. He scored 23 points, grabbed five rebounds and had two assists in helping the City team win, 129-120.
"I loved playing here," he said. "It was a great week and an honor to be part of it."