Atlanta 9, Miami 1
Atlanta pitching prospect Touki Toussaint threw six strong innings in his major league debut and fellow rookie Ronald Acuna Jr. homered for the third straight game to help the host Braves to a 9-1 win over the Miami Marlins in the first game of a day-night doubleheader on Monday at SunTrust Park.
NY Mets 8, NY Yankees 5
Jacob deGrom struck out 12 in 6 2/3 innings and the New York Mets slugged two of their season-high five homers off a slumping Luis Severino on Monday night in an 8-5 victory over the New York Yankees at Yankee Stadium.
Cleveland 10, Cincinnati 3
Yandy Diaz's pinch-hit double sparked a seven-run sixth inning as the Cleveland Indians knocked off the host Cincinnati Reds 10-3 in the opener of a three-game series on Monday night at Great American Ball Park.
Detroit 9, Chi. White Sox 5
Nicholas Castellanos had the first five-hit game of his career, including a go-ahead, two-run homer, and drove in five runs to power the host Detroit Tigers past the Chicago White Sox 9-5 on Monday night.
Atlanta 6, Miami 1
Atlanta Braves rookie left fielder Ronald Acuna Jr. joined some elite company Monday when he homered to lead off both games of a doubleheader sweep against the visiting Miami Marlins.
Texas 5, Arizona 3
Robinson Chirinos hit a go-ahead three-run homer in the fourth inning Monday night and added an insurance run with an RBI single in the eighth inning as the host Texas Rangers beat the Arizona Diamondbacks, 5-3, in the opener of a two-game series at Globe Life Park.
St. Louis 7, Washington 6
Paul DeJong hit a walk-off homer leading off the bottom of the ninth inning as the St. Louis Cardinals defeated the Washington Nationals 7-6 on Monday night at Busch Stadium.
Kansas City 3, Toronto 1
Ryan O'Hearn hit a two-run home run and had three RBIs, Brad Keller pitched seven strong innings, and the Kansas City Royals defeated the visiting Toronto Blue Jays 3-1 Monday night.
Oakland 7, Seattle 6
Sean Manaea pitched 7 2/3 strong innings, and the Oakland Athletics held off a late rally to defeat the visiting Seattle Mariners 7-6 Monday night in the opener of a key three-game series between the American League West rivals.
San Francisco 5, LA Dodgers 2
Pinch hitter Nick Hundley delivered a go-ahead, two-run single in the ninth inning as the San Francisco Giants pulled off a 5-2 victory over the Los Angeles Dodgers on Monday night.
LA Angels 6, San Diego 3
Justin Upton capped a four-run 10th inning with a two-run homer as the Los Angeles Angels scored a 6-3 victory over the host San Diego Padres on Monday in the opener of a three-game interleague series.