The Houston Astros on Sept. 1 fired Manager Bo Porter, who had been in the role since the beginning of the 2013 season. Bench coach Dave Trembley also was fired. “Bo's passion and energy are unparalleled, and his desire to win unquestioned,” General Manager Jeff Luhnow said in a statement. “This decision was not made because of our current level of competitiveness in the Major Leagues.