By Joseph Salvador He’s just five wins away from another major milestone. View the original article to see embedded media. With the Spurs’s Friday win over the Rockets, coach Gregg Popovich became the only coach in NBA history to reach 1,500 wins. The mark includes both regular and postseason wins. The future Hall of Fame coach is only five wins away from the all-time regular season mark of 1,335 wins set by former Bucks, Knicks, Mavericks and Warriors coach Don Nelson, whom Popovich worked under as an assistant for Golden State. Popovich took over in San Antonio back in 1996—his first and onl…