Complex sentence: He attended Southern University in Louisiana where he was team mates with former NBA player and current head coach of the Dallas Mavericks, Avery Johnson; and also attended St. Peter's college on basketball scholarships.
Split into simpler sentences: He attended Southern University in Louisiana where he was teammates with former NBA player and current head coach of the Dallas Mavericks, Avery Johnson. He also attended St. Peter's college on basketball scholarships.