Thanks I will give it more time to focus and turn off the 4 squares. Other posts have said the four squares were the only way to go. It seems to focus fine on moving objects like glaciers and fence posts as well as candid people shots. I even shot some hawks in flight in Wyoming with a lot of success. I have the tracking set where you suggested. I have a game tomorrow night and will post my results. Thanks for taking the time to explain. Again, I didn't have any problems with my old Rebel using the same lenses.
Those telling you about the 'assist points' around centerpoint gave you good advice ... IF you're shooting birds in flight. The focus will 'pass off' to a support point if the bird flies away from the centerpoint.
When shooting basketball with the assist points, they will likely pick up arms waving in front of your intended target or, in your case, the scoring table, the people in the stands or the back wall of the gym.
See how the assist points bail you out in one case (birds in flight) and sink your ship (basketball) in another?
Dial that focus down to the narrowest focus point possible, keep it glued to the letters on a jersey and see if you don't see a huge improvement this week.