Kansas City, Mo ? Raul Mondesi got a big break, and he took advantage of it.

Mondesi hit a two-run homer with one out in the ninth inning and Bernie Williams went 5-for-5 as the New York Yankees rallied for a 7-5 victory against the Kansas City Royals on Thursday night to complete a three-game sweep.

Kansas City's Michael Tucker (24) is congratulated by Luis Alicea after hitting a solo home run off New York starter Orlando Hernandez. Tucker's 11th homer of the season wasn't enough as the Royals lost to the Yankees, 7-5, Thursday night in Kansas City, Mo.

Roberto Hernandez almost retired Mondesi, but catcher A.J. Hinch got a late break on a low pop behind the plate and the ball hit off his glove as he lunged for it.

Mondesi hit the next pitch into the bullpen in left field for his 23rd homer.

“I was supposed to be out,” Mondesi said. “He dropped the ball and I said, ‘I’ve got another chance. Let’s see if I can put the ball in play.”‘

The Yankees won their fourth straight game to move a season-high 31 games over .500. They beat the Royals for the fifth time in six meetings this year and improved to 33-8 against Kansas City since the beginning of the 1998 season.

Williams led off the ninth against Hernandez (1-3) with a single, tying his career high with five hits. He moved to second on a groundout, bringing up Mondesi.

“We had a lot of big hits tonight, not the least of which was Mondesi’s homer,” manager Joe Torre said. “This is probably his defining moment tonight, like Jason’s (Giambi) grand slam that night against Minnesota.”

Jorge Posada added an RBI single in the ninth for the Yankees, who matched last year’s total by winning for the 17th time in their final at-bat.

Williams tied Tony Lazzeri for 10th place on the team’s career list with 1,784 hits. Williams has hits in six straight plate appearances, including the go-ahead single in the 14th inning Wednesday night. He is second in the AL with a .333 average.

“I feel really good at the plate,” Williams said. “I got some good pitches and I was able to put a good swing on them. I think I am being more aggressive, and that’s a key. I have more confidence in my swing.”

The Yankees have won seven straight games in Kansas City and 12 of 13 overall.

“It’s good to get a sweep,” Torre said. “We’ve won some series, but after losing two games to Oakland, to come back on Sunday and win and then carry it over after the off day I thought was important.”

Hernandez blew his seventh save in 26 chances as the Royals lost for the fifth time this season when leading after eight innings. Kansas City hasn’t recorded a save in 26 games since the opener of a doubleheader against Cleveland on July 20.

“It was a slider down. It got more of the plate than I wanted, but it was still down in the zone,” Hernandez said. “When you’re struggling like we are to get wins and you think you make the pitch and then you see it flying out to the bullpen, it’s tough to take.”