"At the moment" means "now" or a period of time that includes now, e.g. "I'm very stressed at the moment."
"At that moment" is possible, but the writer used "in the moment" means at that point in time, including the atmosphere, emotion, tension, pressure etc. of that moment, because in those situations there is a lot of pressure to make a call that can make or break a game or a season.
[Not a teacher]
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