I realize that it completely meaningless to anyone outside of the US and probably most of those within...
Um.... she was named as one of the top 20 players this year in Women's University Club Water Polo in a conference that includes 9 teams of about 20 players each.
She mostly plays defense so doesn't score too many goals, and the voters do tend to get blinded by goals (assists aren't really counted), so that makes it especially impressive.
Her specialty is stealing the ball from the other team, which often has to happen before your team can score a goal
If you score, they get possession again, so....