HOUSTON — The struggling Houston Astros have fired manager Brad Mills and two members of his coaching staff.

Mills became the first big-league manager to be fired this season.

Mills was in his third season as manager of the Astros, who have the worst record in the major leagues. The team announced the moves in an email almost two hours after it lost to the Arizona Diamondbacks 12-4 on Saturday night to fall to 39-82.

Houston also fired hitting coach Mike Barnett and first-base coach Bobby Meacham. The Astros say first-year general manager Jeff Luhnow will name an interim manager and other staff members in a news conference Sunday morning.

Mills was 76-86 in his first season with Houston, and was 56-106 last year — a franchise worst.

The Astros will move to the American League West next season, joining the Mariners, Angels, Athletics and Rangers.

Notes

• Cubs OF Alfonso Soriano, with two RBI against the Reds, joined Barry Bonds, Andre Dawson, Willie Mays, Alex Rodriguez and Gary Sheffield as the only major league players with at least 1,000 RBI, 400 doubles, 350 home runs and 250 stolen bases in their careers.

• Dodgers manager Don Mattingly was suspended for two games and fined an undisclosed amount "for excessive arguing" with umpires in Thursday's loss in Pittsburgh.

• Rockies OF Carlos Gonzalez, hitting .320 with 20 home runs, was placed on the bereavement list after the death of his grandfather in Venezuela.

• Red Sox manager Bobby Valentine says he is disappointed with his performance.

"I'm not doing a good job. I didn't get paid to do anything other than get to the playoffs, win a lot of games, be in the thick in things right down to the end, even be in first place," he said. "The team I'm managing is not there."