KANSAS CITY, Mo. -- Billy Butler isn't the fastest guy on the base paths by any stretch, so the chances of him hitting into a double play are pretty good if he puts the ball on the ground.
Maybe that's why he was so keen on popping a pitch over the outfield wall instead.
The lumbering designated hitter's three-run shot in the eighth inning Tuesday night boosted the Kansas City Royals a 6-4 victory over the Red Sox, putting them in position to finish a seven-game homestand against Boston and the New York Yankees with a winning record.
"The way things have been going, we haven't been coming back in games. Hopefully that gets us going," Butler said. "Hopefully we can feed off that."
Daniel Bard (2-4) walked Jarrod Dyson and Alex Gordon to start the eighth before giving way to reliever Matt Albers. His third pitch to Butler was right in his wheelhouse, and Butler sent it soaring into the fountains beyond the left-field wall.
It was his sixth homer of the year.
"It was huge," Royals manager Ned Yost said afterward.
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"It was my worst outing of the year," Duffy said. "My teammates had my back the whole time and Billy hit that bomb, I was the happiest guy in the world."
Bard ended up with a memorable line: He gave up five runs on six hits and four walks, while also throwing a wild pitch and getting called for two balks during the same at-bat.
"It was really weird," he said. "I can't remember the last time I balked in my life, ever. I don't think I've done it in the big leagues."
Boston rookie Will Middlebrooks followed up his two-homer, five-RBI game in the series opener with a double in the second inning, joining Hall of Famer Enos Slaughter as the only players since at least 1920 to record an extra-base hit in each of their first five major league games.
Marlon Byrd and Shoppach added back-to-back two-out singles to drive in Middlebrooks, who felt tightness in his left hamstring and left the game between half innings. Duffy proceeded to walk Mike Aviles and Pedroia to give the Red Sox a 2-0 lead.
Kansas City answered with three runs in the bottom half of the second inning.
Eric Hosmer singled and Jeff Francoeur drew a walk before Mike Moustakas grounded out to second base, hustling down the line to avoid the double play. That's when Bard was hit with his first balk, which allowed Hosmer to score and sent Moustakas to second base.
Bard argued vehemently with plate umpire Tim Tschida to no avail.
The young right-hander really got riled up when he stepped off the rubber and tried to chase Moustakas back to second base. Bard was hit with another balk, allowing Moustakas to reach third, and the mistake proved critical when Getz's single tied the game.
"They probably get one or two either way," Bard said. "I just tried to settle back in. I knew I was still making good pitches. I wasn't going to let that take me out of my game completely."
Quintero's two-out base hit gave Kansas City the lead, but the plodding catcher -- with one career stolen base -- ended the inning when he was thrown out trying to swipe second.
Duffy could have used some more support the way he was going.
Pedroia knotted the game in the fourth with a single, and the Red Sox pulled ahead in the fifth thanks to more erratic pitching and some lousy Kansas City defense.
Adrian Gonzalez doubled and Nick Punto walked with one out, and Duffy was yanked for reliever Kelvin Herrera. He got Ryan Sweeney to ground into what should have been an inning-ending double play, but Getz threw wide of Hosmer at first base, allowing Gonzalez to score.
The Red Sox remained in front until Butler's game-changing homer.
"I'm just going to let Big Bill do what Big Bill does," Yost said, "hit one in the gap -- and he did a little more than that."
- Boston 3B Kevin Youkilis (lower-back strain) exercised before the game. He's eligible to come off the DL on Monday, though manager Bobby Valentine isn't sure if that will happen. CF Jacoby Ellsbury (dislocated right shoulder) also worked out. "This is the beginning of the next step in his program," Valentine said.
- The Royals recalled RHP Vin Mazzaro from Triple-A Omaha and optioned LHP Tommy Hottovy to the same club.
- LHP Jon Lester (1-2, 4.62 ERA) starts the series finale on Wednesday for Boston. LHP Bruce Chen (0-4, 4.98)) takes the mound for Kansas City.