Ronnie Johnson averaged 10.3 points, 4.1 assists and 3.4 rebounds per game as a freshman at Purdue. In his sophomore season, Johnson averaged 10.8 points and 3.7 assists per game. However, he said he felt coach Matt Painterlost confidence in him. After visitingXavier and receiving interest from Tennessee, Johnson transferred to Houston after the season and sat out a year. He started 13 games as a redshirt junior at Houston and averaged 9.4 points and 2.9 assists per game. After the season, he transferred again to Auburn. As a senior at Auburn, Johnson averaged 7.8 points and 2.3 assists per game on an 18–14 team.