Byline: Dick Heller, THE WASHINGTON TIMES
For those who cherish baseball's old Negro Leagues, a pilgrimage to Union Station is - literally - the best bet in town these days.
In the station's West Hall, about a Josh Gibson home run from the main entrance, you will find a touring exhibit from the Negro Leagues Baseball Museum in Kansas City, Mo. Nearby, a shop is selling Washington Nationals gear, so it's possible to savor the sport's past and future simultaneously.
The exhibit, titled "Discover Greatness," is sponsored by the D.C. Lottery. That seems something of an oxymoron considering baseball's long-standing aversion to gambling, but the lottery folks have done a neat job creating commemorative scratch-off tickets honoring each of the four most renowned and …