Can LED SuperScreens show fast action sport smoothly?

That is like asking will a car go 250 Kph. Some can, some can't.
We only use a reputable brand LED screen that has a very high refresh rate (over 4,000 Hz).
Some products you will find flooding the market are cheaper, but that comes at a cost.
Only quality companies use fast refresh rates and a good brand of tightly batched LED's, which will ensure you always have a sharp picture with fast action and clearer more uniform colours.