I will take it a step further and say that LA in general is not a strong sports area. Some caveats to that:
Before I get to that though I am originally from LA, left there when I was 40 years old. I'm still a Dodger, Lakers and USC fan. I saw Koufax pitch at the Coliseum, had season tickets to the Lakers and USC. I have also been to the World Series twice at Dodger Stadium. I don't know how many times I have been to Dodger stadium, but it is likely around 40-50.
Now about those caveats:
1) LA loves a winner, and remains loyal to a team taht wins. Case in point: USC after Pete Carrol left, or before he got there.
2) Population base: 12-15 million live within 50 miles of downtown LA. If LA was a strong sports city like Boston, Chicago, Green Bay and others, tickets would be far more difficult to get.
3) Over saturation: Two NFL teams, Two MLB TeamsTwo NBA teams, Two Hockey teams, Plus UCLA Plus USC
4) Too many 'foreigners' -- LA is full of people from out of state with loyalty to the original hometown team. You go to a Cubs, or Bulls, or Red Sox or Yankees or many other team games, it seems 25% of the people are wearing the visitors' colors. Other teams the draw is not as strong.
5) Too many distractions -- The beach the mountains, Disneyland, Universal studios and more. Jack Kent Cook was once asked why the LA Kings did not draw well in LA when there is a half million Canadians living in LA. His response was classic:
The Rams have been really good the last 5 years.