If you're an American without any natural ties to a team in England, then I've found one for you to follow. They are a team from London without an ugly history of Hooliganism. They are underdogs to their local rivals Chelsea, Arsenal, and West Ham. They currently have USMNT member Clint Dempsey. Their captain, up until a few years ago, was USMNT great Brian McBride.
The team is Fulham FC. They don't have much in the way of history or trophies. In fact, they were fighting just to stay in the EPL in 2005 when I started following them. Their manager Roy Hodgson made his bones coaching in Europe but was never considered for jobs at big clubs in England. Now he has lead Fulham to the Europa League Final against Atletico Madrid.
Fulham isn't a flashy team like Arsenal. They don't have Chelsea's money. They're not the favorite team of sportswriters like West Ham. They're simply well organized players with a lot of heart.
The biggest moment of the season for Fulham was when the team overcame a 4-1 deficit to Juventus in the Round of 16. The highlight was when USMNT's Clint Dempsey scored the goal to that sent them through. It was a massive goal on the biggest stage.
Jump on the bandwagon.