Cheer the players? Nah. Just crunch their numbers.

By , Staff writer of The Christian Science Monitor

At some point during the World Series, which begins Saturday, one broadcaster will turn to another and say something like, "This at-bat should be a good matchup for Tigers infielder Neifi Perez. Normally, he's a light hitter, but he's 8 for 15 against left-handers whose uniform numbers are higher than 12."

Or maybe something like, "Here comes Joel Zumaya in from the Tiger bullpen. You don't often see him in the second inning, but our research shows he throws hardest between 4 and 4:20 p.m."

An exaggeration? Maybe. Broadcast sports analysis isn't yet quite like astrology.

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But there's a larger point here, and it might come as a surprise to casual fans, the kind who only tune in for the Series: Number crunching is swallowing baseball.

Old standbys like batting averages and RBIs (Runs Batted In) have been outmoded for years. Now, general managers and serious fans talk about QERA (an acronym for "QuikERA"), VORP (Value Over Replacement Player), and other measurements that sound like unheard-of species from "Lord of the Rings."

Some of these tools have reinvented professional baseball. Others cause real mathematicians to break out laughing.

Baseball lifers – figures often associated with the word "crusty" – believe some of them ignore the role chance and personality play in the game. Earlier this week an interviewer pointed out to Tigers' manager Jim Leyland that the American League has won six of the last eight World Series. What did Leyland think of that?

"Not one [bleeping] thing," said Leyland. "Nothing."

For those sports fans who are fully aware of this trend I'm sure there's a story about Iraq somewhere in this edition. For the rest here's a quick history of baseball's new statistical analysis, which is sometimes called sabermetrics after the Society for American Baseball Research.

Some 30 years ago an obsessive Kansas City Royals fan named Bill James started musing about what made a good baseball player good. He asked himself basic questions such as, "Which catcher allows the most stolen bases?" and began compiling data to answer them.

His insight was that baseball – like most human endeavors – was rife with accepted principles that really were unexamined guesses. Why should a team's best hitter bat in the clean-up fourth spot, really? Why should the best relief pitcher serve as a closer who only pitches in the ninth inning? Why was a hitter's batting average more important than their on-base percentage, which also accounted for walks?

Eventually Mr. James came up with other measurements, such as Runs Created (a player's total bases multiplied by the sum of his hits and walks, and then divided by plate appearances) and Win Shares (a statistic that combines offensive and defensive numbers in a manner too long for this parenthetical comment).

James' self-published books sold well in baseball aficionado terms. In 2003 a reader named John Henry, who also happened to own the Boston Red Sox, hired James as a consultant. In 2004 the Red Sox won the World Series.

Coincidence? Yeah, probably.

The other stathead icon is Billy Beane, general manager of the Oakland Athletics, and the central figure of Michael Lewis's sports classic, "Moneyball."

Unlike James, Mr. Beane is a former athlete, a top prospect who flamed out. But he has used an appreciation for statistics and clever management to keep the low-payroll A's near the top of the standings for years, despite a constant loss of such stars as first baseman Jason Giambi (now a Yankee) and pitcher Tim Hudson (an Atlanta Brave).

Beane's approach has never taken the A's beyond the second round of the playoffs, however. And in a famous scene in "Moneyball," he throws a chair against a wall after his underlings take a high school pitcher in the draft. The numbers show that teenage hurlers have a very high washout rate – but the pitcher in question was Jeremy Bonderman, who has since developed into a near-star with the Tigers.

Now baseball team offices and fan publications are full of discussion about things such as QERA (which combines a pitcher's strikeout rate, walk rate, and ground-ball to fly-ball ratio) and VORP (the value a player adds over a statistically average player at his position).

Today more managers look to their player with the highest on-base percentage to lead off, as opposed to the old paradigm of using a speedster. The Tigers' best relief pitcher this year has probably not been their closer Todd Jones but Tijuana-native Mr. Zumaya, who typically comes in at a crisis in the seventh or eighth innings.

But a recent book on the subject, "Baseball Between the Numbers," concludes that even the most accurate of these new statistical measurements combined are no better than an 11 percent factor in the outcome of a season.

And when it comes to predicting the winner of the World Series, you can't do worse than go with the ex-Cub factor, invented by the late Chicago columnist Mike Ryoko.

Any team that employs more than three players who have at any time played for the lovable loser Cubs is doomed.

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