Colorado Rockies pitcher Franklin Morales wipes his forehead during the fourth inning of Game 3 of the World Series. Boston beat the Rockies, 10-5, Saturday in Denver to take a 3-0 lead in the best-of-seven series.

Boston's David Ortiz, right, accepts congratulations from teammates Dustin Pedroia (15) and J.D. Drew after Ortiz scored on a third-inning single by Mike Lowell. The Red Sox defeated the Colorado Rockies, 10-5, in Game 3 of the World Series on Saturday night in Denver.

Denver ? Mile high or sea level, nothing is stopping the Boston Red Sox. Even when the Rockies rallied late, their chance to get back into the World Series vanished into Coors Field’s thin air.

Rookies Jacoby Ellsbury and Dustin Pedroia sparked the Red Sox from the top of the order, Daisuke Matsuzaka pitched shutout ball into the sixth inning, and Boston beat Colorado, 10-5, on Saturday night to move within one victory of a Series sweep.

Ellsbury became the first rookie in 61 years with four hits in a Series game, getting three of Boston’s seven doubles. Pedroia had three hits, including a bunt single that helped set up a six-run third against Josh Fogg

“A huge win for us,” Pedroia said. “With their offense, no lead is safe.”

Down 6-0, Colorado came back with two runs in the sixth, and Matt Holliday’s three-run homer in the seventh on Hideki Okajima’s first pitch cut the Red Sox lead to 6-5.

But then Ellsbury lofted an RBI double down the right-field line off Brian Fuentes in the eighth that just eluded Brad Hawpe’s attempt at a sliding, backhand catch, and Pedroia followed with a two-run double to right that put Boston back in front by four runs. Jason Varitek added a sacrifice fly in the ninth of a game that took 4 hours, 19 minutes – the longest nine-inning game in Series history.

“We got a little comfortable,” Ellsbury said. “It was big to respond after their big inning.”

On Oct. 27 three years ago at old Busch Stadium, the Red Sox completed a sweep of St. Louis for their World Series title in 86 years. Having won seven straight Series games for the first time in franchise history, Boston will try for its seventh championship Sunday. Jon Lester starts for the Red Sox against Aaron Cook in a matchup of pitchers who made it back to the majors after major medical problems.

The 22 previous teams that took a 3-0 World Series lead, all went on to win.

“It looks like we’re in groundbreaking territory,” Rockies manager Clint Hurdle said.

If the Rockies are the National League’s best, the senior circuit has a lot of catching up to do. Maybe it is the rust of a record eight-day layoff for the Rockies, or maybe the Red Sox really are a league above.

Colorado has been outscored 25-7, has only 22 hits and is batting just .222. Boston’s batters were bruisers in the pinball parlor of Coors Field, and hitting .352 in the Series with 16 doubles.

Colorado was the talk of baseball with 21 wins in 22 games coming into the Series. But the Rockies have gone into reverse, looking more like the fourth-place team they were in mid-September.

Boston, meanwhile, has won six straight since falling behind Cleveland 3-1 in the AL championship series. While the Yankees owned the 20th century, the Red Sox are one win from becoming the first team to win two titles in the 21st.

Boston’s Terry Francona, the first manager to start 7-0 in Series history, made all the right moves. Ellsbury, who hit ninth in the opener and No. 8 in Game 2, moved to the top of the order and became only the third rookie with four hits in a Series game, following Freddie Lindstrom in 1924 and Joe Garagiola in 1946. David Ortiz, kept in the lineup despite the loss of the designated hitter in the NL city, doubled in the first run and flawlessly handled both his chances at first base before Kevin Youkilis replaced him in the bottom of the sixth.

Hurdle also made some moves. He benched center fielder Willy Taveras, started Cory Sullivan in center, moved Kaz Matsui to leadoff and batted Troy Tulowitzki second.

Decked out in Rockies purple and bundled in blankets and ski caps, fans at Coors Field were noisy for the first World Series game in Denver’s history. But Fogg allowed 12 of 19 batters to reach, and the crowd of 49,983 quickly became quiet.

Matsuzaka, the first Japanese pitcher to win a World Series game, was worth every penny of the $103 million the Red Sox spent to lure him last winter. He pitched shutout ball into the sixth and wound up allowing two runs and three hits in 5 1-3 innings.

Matsuzaka left after consecutive walks with one out in the sixth, and Javier Lopez allowed consecutive RBI singles to Hawpe and Yorvit Torrealba that made it 6-2.

Mike Timlin relieved, and pinch-hitter Ryan Spillborghs flied to Ellsbury, who was just in front of the center-field wall. Jeff Baker, another pinch hitter, then hit a liner that shortstop Julio Lugo caught with a leaping grab.

Holliday had Rockies fans thinking comeback with his home run into the Rockpile, which ended a streak of 17 1-3 scoreless innings in the postseason for Okajima and closer Jonathan Papelbon. Todd Helton followed with a single, but Okajima recovered to strike out Garrett Atkins and Hawpe, then retired Torrealba on a comebacker.

Colorado put two on with two outs in the eighth off Manny Delcarmen. Papelbon relieved and Holliday hit a drive to left that died and was caught easily by Manny Ramirez. Papelbon then closed out Colorado in the ninth for his second save of the Series.

Boston fans on the third-base side chanted “Let’s Go Red Sox!” early, riling up the Rockies fans, who were waving white towels in hopes of rallying their team.

Matsui singled on the first pitch by Dice-K, his former teammate on the Seibu Lions, but Tulowitzki struck out and slammed his bat in the dirt. Matsuzaka then stabbed Holliday’s comebacker, and Matsui got caught in a rundown. By the time the Rockies finally scored, they were down 6-0.

Fogg pitched out of two-on, no-out trouble in the first and stranded a runner in the second, when he got lucky when Jason Varitek’s bat got loose and bounced through the pitcher’s legs. The ball went to Tulowitzki, who made a barehanded pickup and throw for the out.

Ellsbury doubled to left starting the third, and Dustin Pedroia beat out a bunt single. Ortiz doubled down the first-base line to drive in the first run, Ramirez was intentionally walked to load the bases, and Mike Lowell’s single up the middle made it 3-0.

J.D. Drew popped out and Varitek singled to left, where Holliday made a strong throw home to just catch Ramirez, who appeared to slide past the plate before he slapped it with a hand. While Ramirez signaled himself safe, umpire Ted Barrett called him out.

Lugo’s walk reloaded the bases, Matsuzaka poked a first-pitch single into left for a 5-0 lead, and Ellsbury drove in another run with his second double of the inning.

Notes: Lester overcame lymphoma, while Cook came back from a blood clot. … Before Saturday, the highest altitude for a Series game was 1,117 feet in Phoenix. … Arizona’s Matt Williams doubled twice in an inning against the Yankees in Game 6 in 2001. … Matsuzaka became the first pitcher to drive in runs in the Series since Florida’s Brad Penny had two RBIs against the Yankees in Game 5 in 2003.