By Nick Selbe Mark Lerner, whose father purchased the Nationals in 2006, has begun exploring the possibility of selling the team. View the original article to see embedded media. After 16 years of ownership, the Lerner family has reportedly begun exploring the possibility of making “changes in the club’s ownership structure,” which include a potential sale of the team, according to Barry Svrluga of The Washington Post. Mark Lerner, the son of real estate magnate Ted Lerner who originally bought the team in 2006, has hired New York investment bank Allen & Company to research potential investors…