- The Reds announced a series of coaching changes Monday. Former Astros farmhand Rolando Valles has been promoted from major league associate coach to major league assistant coach. Kyle Arnsberg, the game-planning coach for Double-A Chattanooga, was also promoted to an assistant coach role on the MLB staff. Former Vanderbilt infielder Joel McKeithan has been named a major league assistant hitting coach and offensive coordinator. Bullpen catcher Nate Irving has taken over Arnsberg’s old role in Chattanooga, where he’ll also serve as the bench coach.