[KenWittlief]

It seems like the easy approach to track one player on a basketball court would be a video camera looking down from the ceiling.

There are tons of video/camera inspection SW programs used in many industries, I think it should be possble to get something off the shelf that can analyze a video image stream, and track a moving object - esp since the rest of the field of view will be stationary (the floor of the basketball court).

The only place it might have difficulty is when the player shoots the ball. You might need the player to wear a unique color hat or shirt, to discriminate between the player and the moving ball.