I'd use had .
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CalifJimEverything in the context is written in the past point of view. There is nothing to suggest that the author is still playing basketball in present time. In fact, as the story progresses, we see that it is quite certain that the author no longer plays basketball in present time.There's this sentence which messes up the tenses:
CalifJimYes, indeed. Surprisingly, the sudden shift of point of view is not too shocking in this example! I've seen cases that were much more nerve-jangling than this one!