The 6-foot-1 junior combo out of Girard College committed to the Panthers Thursday afternoon.
"I think that could be my family away from home," Johnson texted. "I like their style of play and it's not too far that my family can't see me play."
Johnson attended the Reebok All-American Camp last summer. However, it was during the high school season when Johnson made the most waves. As a sophomore, he led Girard College to the 2009 Pennsylvania state championship.
Johnson averaged 21 points as a sophomore.