Royals 6, Orioles 4: Alcides Escobar delivered a tiebreaking RBI double in the ninth inning as visiting Kansas City took a surprising 2-0 lead in the American League Championship Series while remaining perfect in the postseason.

Lorenzo Cain had four hits, drove in a run in the ninth and scored twice, Mike Moustakas homered for the third straight game and executed a key sacrifice, and Eric Hosmer drove in two runs for the Royals, who are 6-0 in the playoffs as they head home for Game 3 of the best-of-seven series on Monday. Wade Davis (2-0) earned the victory by pitching a scoreless eighth inning while Greg Holland worked around a two-out single in the ninth to earn his fourth save of the postseason.

Kansas City starter Yordano Ventura departed with two out in the sixth inning with shoulder tightness after allowing four runs and five hits. Adam Jones hit a two-run homer while Nelson Cruz and Caleb Joseph recorded an RBI apiece for Baltimore, which last lost consecutive home games June 28-29.

Omar Infante led off the ninth against Darren O'Day (0-2) with an infield single and pinch runner Terrance Gore advanced to second on Moustakas' sacrifice against Zach Britton. Escobar laced a hard grounder down the line the opposite way past first baseman Steve Pearce on the next pitch to drive in Gore before Jarrod Dyson reached on an error and Cain drove in Escobar with a single through the hole into left.

The Royals took an early lead on Hosmer's two-run two-out bloop single in the first and moved ahead 3-1 in the third on Billy Butler's two-out RBI double. After Jones homered in the bottom half to tie it, Moustakas - the No. 9 hitter - belted his fourth home run of the postseason to make it 4-3 in the fourth before the Orioles answered in the fifth with one-out singles by Alejandro De Aza and Jones, and Cruz's run-scoring fielder's choice - his 20th RBI in 14 ALCS games.

GAME NOTEBOOK: Baltimore starter Bud Norris yielded four runs and nine hits in 4 1/3 frames. ... Moustakas' four postseason homers tie the club record set by Willie Aikens in 1980 as Kansas City, which hit a major league-low 95 home runs during the regular season, has eight in six playoff contests. ... Joseph was hitless in 33 at-bats dating to Sept. 10 before recording a two-out single in the fourth inning after driving in the Orioles' first run with a sacrifice fly in the second.