Associated Press

Major League Baseball expanded its playoff format to 10 teams Friday, adding a second wild-card in each league.

The decision establishes a new one-game, wild-card round in each league between the teams with the best records who are not division winners, meaning a third-place team could win the World Series.

This is the only change in baseball's playoff structure since the 1995 season, when wild-card teams were first added.

Congressman Kenny Hulshof defeated state Treasurer Sarah Steelman in the Missouri Republican gubernatorial primary.

With 98 percent of the precincts reporting results, Hulshof received about 49 percent of the vote, to Steelman's 45 percent.

Attorney General Jay Nixon won the Democratic nomination for governor with 85 percent of the vote.

In January, GOP Governor Matt Blunt announced he would not seek re-election.

Missouri State Senator Chris Koster declared a victory in the Democratic attorney general primary on Tuesday. His opponent state Rep. Margaret Donnelly may ask for a recount.

Koster leads by 854 votes out of 345,972 votes cast.

Phill Kline lost the Johnson County district attorney's office in the Republican primary Tuesday night. Kline's prosecution of abortion clinics proved to be a key issue in the race.

Challenger Steve Howe, a former assistant district attorney received 60 percent of the vote. In the general election in November, Howe will face Democrat Rick Guinn, also a former district attorney who works in the attorney general's office.