Austin's NBA Coaching Pipeline. When Jonathon Simmons plays his first game with the Spurs this season, he’ll mark the 25th Austin Spurs player to make the leap from the D-League to the NBA. But there are nine more Austin Spurs call-ups that have made their mark in the NBA: the coaches.an Antonio Spurs shared a link. October 7 at 2:13pm ·. Austin's NBA Coaching PipelineWhen Jonathon Simmons plays his first game with the Spurs this season, he’ll mark the 25th Austin Spurs player to make the leap from the D-League to the NBA.