Kansas City's Jose Guillen connects for a base hit that scored Mike Aviles in the 11th inning. The run lifted the Royals to a 6-5 victory Monday in Baltimore.

Baltimore ? The scouting report said Miguel Olivo has difficulty hitting breaking balls, so George Sherrill tried to seal a victory for the Baltimore Orioles by throwing a slider with two outs in the ninth inning.

The strategy was sound. The pitch was not.

Again.

Olivo homered on an 0-2 pitch to force extra innings, and Jose Guillen singled in the tiebreaking run in the 11th to give Kansas City a 6-5 comeback victory Monday.

For a second straight game, Sherrill blew a save by yielding a two-out homer. On Sunday, Sherrill had a 1-2 count on Washington’s Ronnie Belliard, who hit a two-run, game-winning drive in the bottom of the 12th.

“Same pitch, same spot,” the lefty said. “I was just trying to bounce it, and both of them rolled.”

When he got to the dugout, Sherrill angrily hurled a bucket of bubble gum onto the field. It wasn’t the first time he had surrendered home runs in successive games, but that didn’t make it any easier to take.

“I’ve had it before, but it’s not any more fun,” he lamented.

Olivo, a teammate of Sherrill’s in Seattle in 2004-05, said, “You go for a pitch you can swing at, you can hit. I see a breaking ball hanging, and I made contact. … He just leave that ball up a little bit, and I make contact.

“It’s a good feeling when you hit a home run and tie the game in the ninth inning. I know it’s a not good feeling for him, but that’s part of baseball.”