Are Showdown rewards repeatable?

Or only get one pack/silver player/gold player only once when you reach that checkpoint?

Yes they are repeatable. Everything except the 70 program stars for the 1st inning that is

@Raadush said in Are Showdown rewards repeatable?:

Or only get one pack/silver player/gold player only once when you reach that checkpoint?

You can only do once during that entry.
after claiming the final reward you can reenter and earn the rewards again

Good. That means once you pass first imtermediate showdown, you very likely got your entry fee back, thats good