By Nick Selbe The 17-year veteran will trade in his broadcasting microphone for referee pinstripes. View the original article to see embedded media. Richard Jefferson spent 17 seasons in the NBA with eight different teams before retiring after the 2017-18 season. On Monday, he’ll take the court once more during the Summer League, though this time wearing a very different shirt. Jefferson will step in to play the role of official for one quarter during the Knicks-Trail Blazers game, the league announced Monday. He will try his hand at refereeing for the second quarter, and then join ESPN2’s bro…