Clayton Kershaw collected his 19th win of the season as he led the Los Angeles Dodgers to a 4-2 win over the San Francisco Giants on Sunday.
The pitcher was at his devastating best in San Francisco as he led his side to a vital win, as the Dodgers moved three games ahead of the Giants in the National League's West division.
The result ensured the Los Angeles side won the three-game series, with their three meetings in LA next week set to be crucial in deciding the winner of the divisional title.
Kershaw (19-3) was well supported, with Matt Kemp hitting his 20th homer of the season and Juan Uribe and AJ Ellis driving in a run each.
The Oakland Athletics extended their lead at the top of the American League wildcard standings as they enjoyed a 4-0 shutout win over the Seattle Mariners.
Solo homers from Sam Fuld and Brandon Moss were the highlights for the A"s as they won consecutive games for the first time in three weeks, ending a spell of indifferent form.
Oakland hold a 1.5-game lead over Kansas City and 2.5-game lead over the Mariners in the AL play-off race with a third straight post-season appearance now firmly in their grasp.
Elsewhere in the American League, the Tampa Bay Rays almost let a 4-0 lead slip against the Toronto Blue Jays in Canada, before a sacrifice fly from Sean Rodriguez in the 10th inning got the away side over the line 5-4.
JD Martinez and Ian Kinsler both hit homers as the Detroit Tigers beat the Cleveland Indians 6-4 to sweep their best-of-three series, with the win allowing the Tigers to re-open a 1.5-game lead in the AL Central division.
The Boston Red Sox scored eight unanswered runs, including a grand slam from Daniel Nava, as they came from behind to beat the Kansas City Royals 8-4 in a result that damages the latter's push for the playoffs.
The Texas Rangers completed their sweep of the Atlanta Braves as they cruised to a 10-3 victory, while the Houston Astros upset the high-flying Los Angeles Angels 10-3, bringing their 10-game winning streak to an end.
Rookie Trevor May had a day to remember, pitching three perfect innings and striking out five as the Minnesota Twins saw off the Chicago White Sox 6-4, while AL East leaders the Baltimore Orioles walked off against the New York Yankees 3-2.
Washington moved to 13-3 against the New York Mets for the season as Jordan Zimmermann and Wilson Ramos led the Nationals to a 3-0 win at Citi Field.
Philadelphia pitcher Jonathan Papelbon gave up four runs in the ninth inning before getting ejected after making lewd gestures to the crowd as the Miami Marlins stormed home to beat the Phillies 5-4.
The Pittsburgh Pirates kept themselves in the NL wildcard places with a 7-3 win over the Chicago Cubs while the Milwaukee Brewers ensured they remained 1.5 games behind the Pirates as they eased past the Cincinnati Reds 9-2.
The St Louis Cardinals registered their third win in as many games as they beat the Colorado Rockies 4-1 and the Arizona Diamondbacks proved too good for the San Diego Padres in a series-clinching 8-6 win.