I don't shoot basketball, but thought I'd show you a few shots taken with an 85 f/1.8. It's a very nice lens, especially for the price.
These shots were all taken with a 30D and an 85 f/1.8 with ambient light. Hope this helps.
1/200s f/8.0 at 85.0mm iso400
1/125s f/1.8 at 85.0mm iso400
1/50s f/2.2 at 85.0mm iso100