WASHINGTON — Almost 24 hours after the Pistons and Washington Wizards completed a four-player trade, the two teams met in the nation’s capital for a matinee on the national holiday dedicated to Dr. Martin Luther King Jr. There was a uniqueness to the game. Not just because of the tributes to commemorate Dr. King’s legacy, but because both teams sat at the bottom of the Eastern Conference standings, and they just swapped a pair of players. While former Wizards Danillo Gallinari and Mike Muscala weren’t available for the Pistons, there was one veteran who was locked, loaded and ready to shoulder…