Like no other corner of American popular culture, baseball communicates in numbers. From .406 (Ted Williams's 1941 batting average) to 755 (Hank Aaron's record home run total) to countless digits bandied about water coolers every morning, statistics convey ideas and images that, even overnight, become inseparable from the players to whom they belong.

This relationship between players and numbers, so often romanticized, is now being stripped to its skeleton in a lawsuit with considerably wider ramifications. While the dispute focuses on fantasy baseball — in which millions of fans compete against one another by assembling rosters of real-life major leaguers with the best statistics — a real legal question has arisen: Who owns that connection of name and number when it is used for such a commercial purpose?

Many onlookers have cast this issue as a tiff over batting averages — as if children were squabbling over the backs of baseball cards — but legal experts are saying it could affect the wider arena of celebrity rights, freedom of the press and even how the press is defined as the Internet age unfolds.

The dispute is between a company in St. Louis that operates fantasy sports leagues over the Internet and the Internet arm of Major League Baseball, which says that anyone using players' names and performance statistics to operate a fantasy league commercially must purchase a license. The St. Louis company counters that it does not need a license because the players are public figures whose statistics are in the public domain.