Getty Mark Cuban returns to the picture as the Dallas Mavericks fired general manager Nico Harrison. The man Nico Harrison tried to cut off from the Dallas Mavericks ’ inner circle has come back to haunt him. According to Dallas-based NBA insider Marc Stein , former Mavericks majority owner Mark Cuban met privately with new team owner Patrick Dumont on the eve of Harrison’s firing — a symbolic reunion that effectively ended Harrison’s reign as general manager. Cuban Meets With Dumont Before