On This Day: Magic Johnson Reveals That He Has HIV

A World Series showdown with the Yankees is just one of many factors drawing attention to Philadelphia, a fascinating city that many former New Yorkers now call home.

Three participants in the 2009 Detroit Marathon died within minutes of one another. Though running-related deaths are rare, they cause other runners to ask, “Is marathon running dangerous?”

On Oct. 15, 1981, professional cheerleader Krazy George Henderson led the first audience wave at an Oakland Athletics game.

Officials from Wisconsin's Lakefront Marathon have disqualified two women that finished first and second in the race, irking some and calling to mind previous marathon flukes.

An NFL-commissioned study found that retired players suffer from dementia and other memory-related diseases at many times the normal rate. The findings support prior independent research that the NFL has tried to discredit.

On Sept. 23, 1845, the Knickerbocker Base Ball Club was founded. Its bylaws, which included rules on how to play the game, are considered the basis of modern baseball rules.

An Illinois pastor swam across the English Channel to raise money for building a school in Angola.

NFL Pro Bowlers Matt Birk, Lofa Tatupu and Sean Morey will donate their brains to a program studying chronic traumatic encephalopathy (CTE), a neurological disorder caused by blows to the head.

Melanie Oudin isn’t the first U.S. tennis star to break onto the scene as a teenager, but her style of play has injected some of Justine Henin into the current U.S. team.

The Folds of Honor Foundation holds its annual fundraiser, Patriot Golf Day, to provide education scholarships for the spouses and children of American veterans.

On Sept. 1, 1980, amputee Terry Fox was forced to stop his 5,000-mile run across Canada for cancer research after it was discovered that his bone cancer had spread to his lungs. He died 10 months later, but not before realizing his dream of raising one dollar for every person in Canada.

South African runner Caster Semenya is being tested to determine whether she is a female amid suspicion that she may actually possess the genetic characteristics of a male.

After three players—David Wright, Ian Kinsler and Hiroki Kuroda—were hit in the head by a pitch or line drive, we look back on the most frightening incidents of players being struck in the head.

On Aug. 16, 1920, Cleveland Indians shortstop Ray Chapman was struck in the head by a pitch. He died a day later, becoming the only player in major league history to die from a pitched ball.

As athletes are increasingly sharing their personal lives and opinions on Twitter, leagues struggle to balance fan engagement with inevitable controversy.

On July 27, 1996, a bomb killed one and injured 111 visitors at the Centennial Olympic Park in Atlanta. Security guard Richard Jewell was wrongfully accused of planting the bomb and defamed by the media.

On July 24, 1983, the Royals’ George Brett wildly charged toward umpires after his ninth inning home run was disallowed because there was too much pine tar on his bat.

As a new professional football league, the United Football League, prepares to begin play this fall, we look back at the professional football leagues that have failed in the last four decades.