The Houston Astros fired manager Bo Porter on Monday after a 59-79 record in his second season.

General manager Jeff Luhnow named Tom Lawless as the interim manager for the remainder of the 2014 season. Luhnow also fired bench coach Dave Trembley.

"This was not an easy decision to make. We wish Bo nothing but the best in the future," Astros owner Jim Crane said in a statement. "Jeff has my full support moving forward. Our goal to bring a championship to Houston remains."

Porter, 42, had been the Astros manager since the start of the 2013 season after being named to the position on Sept. 27, 2012 while serving as third base coach for the Washington Nationals. He compiled a 110-190 record (.367 winning percentage) in parts of two seasons as Astros manager.

Adam Everett will join the coaching staff, replacing Trembley as bench coach. The remaining coaches will continue in their current roles.

Lawless, who has close to 35 years of experience in baseball as a major league player, minor league manager and coach, had served as the manager for Triple-A Oklahoma City earlier this season while Tony DeFrancesco was on medical leave before returning to his role as a roving infield instructor.

"Bo's passion and energy are unparalleled, and his desire to win unquestioned," Luhnow said in a statement. "This decision was not made because of our current level of competitiveness in the Major Leagues. I recognize that our win-loss record is largely a product of an organizational strategy for which I am responsible. Rather, I made this decision because I believe we need a new direction in our clubhouse.

"What we will seek going forward is a consistent and united message throughout the entire organization. It is essential that as an organization we create an atmosphere at the Major League level where our young players can come up and continue to develop and succeed. Ultimately, I am responsible for creating that culture, and I will do everything in my power to do so-even when it means making difficult moves like the one we made today.

"Moving forward, I am optimistic about the direction of our team. Our young core continues to progress, and I believe wholeheartedly that our plan -- while at times challenging -- is working and will bring a consistent winner to Houston in the very near future."