BALTIMORE — Jose Quintana dazzled in his debut for the Chicago Cubs, striking out a season-high 12 in seven sharp innings to beat the Baltimore Orioles 8-0 Sunday for a three-game sweep.

Acquired by the World Series champions during the All-Star break from the Chicago White Sox for a playoff push, Quintana gave the Cubs exactly the kind of boost they hoped to get. The lefty ace allowed three hits, walked none and joined Matt Garza as the only pitchers in Cubs history to fan 12 in their debut.

Kris Bryant and Anthony Rizzo homered to help the Cubs move over .500 for the first time since June 29. The Cubs hit 10 home runs during the sweep at Camden Yards.

NATIONAL LEAGUE

DODGERS 3, MARLINS 2: Justin Turner homered and singled to increase his batting average to .374, and Los Angeles extended its winning streak to nine with a win in Miami.

PIRATES 4, CARDINALS 3: Adam Frazier’s game-ending single capped a two-run rally in the ninth inning that lifted Pittsburgh to a win at home.

PHILLIES 5, BREWERS 2: Rookie Nick Williams hit his first career grand slam before Philadelphia’s bullpen escaped two late-game jams for a win in Milwaukee.

BRAVES 7, DIAMONDBACKS 1: Matt Kemp hit a three-run homer and Brandon Phillips doubled three times, leading Atlanta over reeling Arizona for a three-game sweep in Atlanta.

NATIONALS 14, REDS 4: Daniel Murphy hit two of Washington’s five home runs and had five RBI to lead the Nationals to a win in Cincinnati.

ROCKIES 13, METS 4: Ian Desmond provided an instant spark for the slumping Rockies in his return from the disabled list, and Nolan Arenado hit one of Colorado’s three homers during a rout in New York.

PADRES 7, GIANTS 1: Hector Sanchez and Corey Spangenberg each hit a three-run homer off Jeff Samardzija and host San Diego beat San Francisco.

American League

MARINERS 7, WHITE SOX 6: Nelson Cruz homered on a 3-0 pitch to lead off the 10th inning and Seattle won in Chicago for a three-game sweep.

Danny Valencia and Kyle Seager also homered for the Mariners, who are one game below .500 and trying to stay in the AL wild-card race.

ANGELS 4, RAYS 3: Pinch hitter C.J. Cron connected for a tiebreaking, two-run homer in the eighth inning and host Los Angeles escaped a jam in the ninth to hold off Tampa Bay.

ROYALS 4, RANGERS 3: Right fielder Shin-Soo Choo lost Lorenzo Cain’s routine fly in the sun, and the ball glanced off his glove for an RBI single with two outs in the ninth inning that lifted Kansas City over Texas in Kansas City, Missouri.

TIGERS 6, BLUE JAYS 5: Miguel Cabrera walked with the bases loaded in the 11th inning, giving host Detroit a victory over Toronto.

ASTROS 5, TWINS 3: Mike Fiers struck out a season-high 11 over seven strong innings and Nori Aoki had two hits and two RBI to help Houston win at home.

ATHLETICS 7, INDIANS 3: Cleveland starter Trevor Bauer got just two outs in a four-run first inning and matched the shortest start of his career as Oakland beat the Indians in Oakland, California.