San Francisco overcame an early three-run deficit to beat Washington 5-3 on Saturday and hang onto the outright lead in the National League West division.
Jose Bautista, Edwin Encarnacion and Troy Tulowitzki each hit solo home runs in the first inning, Marco Estrada ended a four-start winless streak and the Toronto Blue Jays beat the Baltimore Orioles 6-5 on Friday.
The Chicago Cubs saved their scoring and drama until the later innings. Aroldis Chapman then capped it in his Cubs debut, even in a non-save situation.
Francisco Lindor watched his hit squirt into the outfield and then danced his way down the first-base line before being engulfed by a wave of elated teammates.
Taiwanese relief pitcher Chien-Ming Wang pitched his worst game this season on Tuesday against the Los Angeles Angels at Kansas City.
Austin Romine hit a tiebreaking double in the eighth inning to make a winner of Michael Pineda, and the New York Yankees' bullpen did just fine Monday night without star closer Aroldis Chapman in a 2-1 victory over the Houston Astros.
The Chicago Cubs, in contention for their first World Series title since 1908, addressed one of their few weaknesses by trading for closing pitcher Aroldis Chapman from the New York Yankees on Monday.
Baltimore pinch-hitter Nolan Reimold hit a game-winning, two-out homer in the ninth inning to give the Orioles a 5-3 win against Cleveland on Sunday, completing a three-game sweep of their rival American League division leader.
Los Angeles slugger Adrian Gonzalez hit a 429-foot homer to spark a three-run sixth inning which lifted the Dodgers to a 7-2 win at St. Louis on Saturday in a clash of National League contenders.
Baltimore's rookie pitcher Dylan Bundy notched his first major league victory as a starter as he steered the Orioles to a 5-1 victory over Cleveland on Friday that moved them back to the top of the American League East standings.