Somehow, Buck Showalter had steered the conversation to roller coasters.

"I got enough things to be scared of in my life," the Orioles manager said dismissively of the death-defying rides. "We got one-run games. I get on the roller coaster every night, and they don't put the bar down."

Showalter was having a little fun with the writers who cover his team, but his metaphor for the 2012 season wasn't far off. The Orioles, underestimated by everyone from national commentators to their own die-hard fans, have performed magnificently in the tight games that churn managers' stomachs.

As a result, they enter September not only with a strong shot at breaking the franchise's 14-year streak of losing records but as a serious playoff contender. The wider baseball world, which seemed to assume the Orioles would go poof for most of the year, is taking notice.

"I think people are finally starting to understand what a great story is developing in Baltimore," said ESPN analyst Tim Kurkjian, a former Orioles beat writer.

Kurkjian has heard the same question on a series of radio and television appearances in the last week: How are they doing this?

"My answer is that I have no idea," he said. "But that's what makes this such a good baseball story."

There is no better question about this year's team, because even a careful analysis of the numbers leaves one grasping for explanations.

Asked what he would opine about the team if he were still an analyst on ESPN, Showalter said, "I would love it, because all the numbers and stuff they crunch up there, we lean against all that. I was talking to [ESPN analyst] John Kruk the other night and he said, 'We can't explain it.'"

The Orioles don't put a high percentage of runners on base. Their patchworked starting rotation is below average at preventing runs. The team's most established players, save for Adam Jones, are posting middling seasons by their own standards. Even Jones has tailed off in recent weeks.

The club hasn't been lucky with injuries. Its young starting pitchers, thought to be the key to the season, have frequently been dispatched to the minors or relegated to the bullpen.

"They ran out of bullets a month ago," Kurkjian said in assessing the club's talent. "And yet they've played even better since then."

Many have drawn comparisons to the 1989 Orioles, who stayed in contention until the penultimate day of the season after losing 107 games the year before. That team's slogan was "Why Not?" Showalter said his players, confronted with expert opinions dismissing their chances, like to respond, "Says Who?"

At its most basic level, baseball, like any sport, is about outscoring the opposition. The Orioles had been outscored by 46 runs overall through Wednesday, putting them in the company of the lowly Kansas City Royals and San Diego Padres, far below any other team in playoff contention.

Baseball historian Bill James devised a statistic called Pythagorean winning percentage that projects team records based on the difference between runs scored and runs allowed. James found that the statistic is more predictive of future performance than a team's actual record. By this measure, the Orioles should have been 60-69 through Wednesday, not 71-58. The difference between their actual and projected records is one of the greatest in history, according to Baseball-reference.com.

The Orioles take pride in shrugging off such analysis.

"We hear about how terrible we're supposed to be from the national media, according to the stats they choose to care about," said All-Star closer Jim Johnson. "We only care about the wins and losses. They can tell us how bad we are at fielding, how bad we hit with runners in scoring position. All that stuff. We don't care."

What the Orioles do well, better than any team in recent baseball history, is win close games. The common wisdom among baseball's statistical acolytes is that teams should break even in games decided by one run. An excellent or poor record in these games is regarded as a sign of good or bad luck, respectively.

Well, the Orioles were an almost-unfathomable 24-6 in one-run games through Thursday. (Next best in the league were the Cleveland Indians at 15-7.) The Orioles are even better, 12-2, when games go to extra innings.