MINNEAPOLIS (AP) - The Kansas City Royals became the only unbeaten team in the majors as Danny Duffy pitched into the seventh inning and Kendrys Morales homered in a 12-3 romp over Minnesota, spoiling the Twins' home opener Monday.
The defending American League champions improved to 7-0. It's the second-best start in Kansas City's history, behind the 2003 club that won nine in a row to begin the season.
Detroit, which had been the only other undefeated team in the big leagues, lost 5-4 at Pittsburgh earlier in the day.
Duffy (1-0) went 6 1/3 innings, giving up three runs.
The Twins lost their fourth straight opener. Trevor May (0-1) in the second inning into the upper deck.
ROCKIES 2, GIANTS 0
SAN FRANCISCO (AP) - Eddie Butler outdueled fellow rookie Chris Heston and the Colorado Rockies spoiled San Francisco's latest World Series championship celebration at the Giants' home opener.
Troy Tulowitzki, back in the lineup after a day off, hit an RBI sinlge in the fourth inning against Heston (1-1). San Francisco raised its third World Series winning flag in five years before the game.
Butler (1-0) tossed 5 1-3 innings of five-hit ball, walking six. Rafael Betancourt struck out two in a perfect ninth for his first save since Aug. 20, 2013.
PIRATES 5, TIGERS 4
PITTSBURGH (AP) - Gerrit Cole shut down baseball's top-hitting team, allowing one run in six-plus innings as the Pittsburgh Pirates handed the Detroit Tigers their first loss of the season.
The Tigers were trying to match the 7-0 start set by the 1984 club that went on to win the World Series.
Cole (1-0) struck out eight and walked two while giving up three hits in the Pirates' home opener. Josh Harrison, Pedro Alvarez and Corey Hart homered for Pittsburgh.
Anibal Sanchez (1-1) surrendered five runs in 6 1-3 innings. Miguel Cabrera went 2 for 4 with an RBI double.
RED SOX 9, NATIONALS 4
BOSTON (AP) - Mookie Betts hit a three-run homer, jumped to take away a home run from Bryce Harper and stole two bases on the same pitch, leading the Boston Red Sox over Washington in their home opener.
Rick Porcello (1-1) won his Fenway Park debut, allowing four hits in eight innings. Ryan Zimmerman and Danny Espinosa homered off Porcello.
The Red Sox rolled to an 8-0 lead after three innings against Jordan Zimmermann (1-1). He was as wild as Patriots quarterback Tom Brady, whose ceremonial first pitch to David Ortiz bounced in the dirt in the left-hander's batters' box.
Ortiz homered in the sixth.
METS 2, PHILLIES 0
NEW YORK (AP) - NL Rookie of the Year Jacob deGrom and the New York Mets won their home opener, shutting down Philadelphia.
DeGrom (1-1) gave up seven hits in 6 1-3 innings before a sellout crowd of 43,947 at Citi Field.
Daniel Murphy doubled with in the fourth, advanced on a flyout and scored when Juan Lagares hit a comebacker that a twisting Aaron Harang (1-1) knocked down with his glove. But the 36-year-old righty stumbled awkwardly for a moment on the mound and was slow to retrieve the ball. By the time he threw to first, Lagares beat the play for an RBI single.
BREWERS 5, CARDINALS 4
ST. LOUIS (AP) - Matt Garza overcame five walks to earn his first career win in St. Louis and Carlos Gomez had two hits and an RBI for the Milwaukee Brewers.
Adam Wainwright (1-1) started his fourth opener at 10-year-old Busch Stadium and gave up five runs - three earned - in seven innings.
Francisco Rodriguez earned his first save, helping himself with the defensive play of the game when he reached behind his head and snared Jhonny Peralta's liner leading off the ninth.
Garza (1-1) allowed two runs - one earned - in 5 2-3 innings to win for the first time in six career starts in St. Louis. He entered 0-2 with a 6.95 ERA.