Orioles payroll is 4th from the bottom. Peter Angelos has been furious at MLB ever since they brought a 3d Washington team (the first two ended up in Minneapolis and Arlington (TX) to DC. This one is is pretty good and drawing fans, many of them away from Camden Yards. Right now the Orioles average attendance is in Rays territory--16K/game. The Rays bring in 14.5K/game. In 2001 the Orioles were drawing 38.7K/game. In 2005 they drew 32.4K/game and the new Washington Nationals drew 33.7K/game.
The Orioles franchise goes back to 1901 and the creation of the American League--and were called the Milwaukee Brewers and just a year later they became the infamous St Louis Browns for 52 years. They almost went bankrupt, but found a home in Baltimore, where they have now been for 65 years This is why I think of Baltimore as a good baseball town, but of course what really helped them was being close to the National Capital Region, whose population has grown exponentially since World War II. I also think Camden Yards is a terrific ball park.
Fairfax County, where I live, had a population of 41K in 1940, and is now at 1.1M. And most of Fairfax County is within 60 miles of Camden Yards. Unfortunately, and this helps explain why the Orioles attendance keeps plunging, driving those 60 miles must be done basically during rush hour for night games. Thus I'm looking at my apple map which tells me that, while the Orioles are 41 miles away, it takes over 2 hours to get there. And don't forget that most night games start at 7 and can easily go to 11 pm, which means getting home after midnight.
Montgomery County in Maryland (but is basically in the outskirts of DC) was at 84K in 1940 and today is at 1M and change. They too find the Nationals a better option, plus they have lots of DC Metro stops (more than Fairfax County), and Nationals Park has their own Metro stop.
All of the above makes Nationals Ballpark, which is also a good (but not as good) venue, a much more attractive option.