By Tzvi Machlin Between 2006 and 2009, Tony Romo and Marion Barber gave the Dallas Cowboys a passing and rushing combination that the team hadn’t enjoyed since Troy Aikman and Emmitt Smith. Over the weekend, Romo paid tribute to his recently departed former teammate. Taking to Twitter this morning, Romo offered his thoughts and prayers to Barber and his family. “Cowboys fans will never forget his aggressive running style and shear energy he brought every time he was on the field. He could run, block, catch and he do all the dirty work and ask for more. It was a pleasure playing alongside him,”…