CHICAGO — They rushed toward the mound, these remarkable Tampa Bay Rays, and immediately formed a circle. Jumping together like fraternity brothers, they resembled party regulars in the postseason.

Worst in the majors last year, Tampa Bay will play for a spot in the World Series.

"It means everything. We've been at the bottom of the barrel for so long," B.J. Upton said yesterday after homering twice in a 6-2 win over Chicago that clinched their AL playoff series. "I think there was a point in time where people didn't even know who we were."

They do now, for sure.

Andy Sonnanstine pitched 5 2/3 solid innings and manager Joe Maddon's surprising Rays won 3-1 in the best-of-five series — their first trip to the postseason. Next up, the Boston Red Sox starting Friday.

Ray-markable!

"We feel like we belong and it's showing right now," Upton said.

They want more, too. So why stop now?

"Like Carlos (Pena) said, we're kind of a fraternity. And we stick together at all times no matter what happens," Upton said. "As long as we keep that attitude and continue playing as a team, and doing the little things to win, I don't think there's any reason why we can't win this whole thing."

After staving off elimination several times and winning a tiebreaker for the AL Central title, the White Sox were finally knocked out.

"They played better than us. There's no doubt. They pitched better. They execute better. They got big hits," White Sox manager Ozzie Guillen said. "They really did a tremendous job."

Upton, the game's second batter, homered to left-center to put the Rays ahead. He went deep again in the third, driving a full-count pitch from Gavin Floyd to center, and the confident Rays had a two-run cushion.

Tampa Bay, which never won more than 70 games during its 10 previous seasons, went from 96 losses last year to 97 wins and passed the big-spending Red Sox and New York Yankees in the AL East.

"It's good for baseball for a team like Tampa to win," White Sox owner Jerry Reinsdorf said. "It's too bad they had to beat us, but it's good for the game."

Sonnanstine allowed two runs and three hits before J.P Howell relieved. Grant Balfour completed the four-hitter, striking out midseason addition Ken Griffey Jr. to end it.

"Obviously, this is an incredible accomplishment and we're going to take tonight and really enjoy it, but when you are mired in the day-to-day it's hard to step back and appreciate what we've accomplished this year," Rays general manager Andrew Friedman said. "We're focused on having two more celebrations."

Upton, who hit nine homers in 531 at-bats during the regular season, also homered in Sunday's 5-3 loss. Benched by Maddon during the season for not hustling, the talented 24-year-old's power display came against a team that relied on homers all year and led the majors in long balls.

"B.J.'s special," Maddon said.

Tampa Bay increased the lead to 4-0 in the fourth when Carl Crawford walked and scored as veteran Cliff Floyd, a Chicago native, doubled to left. Dioner Navarro followed with an RBI single to finish Floyd.