Which is just Evan Miya's fancy name for their overall rating (which I think just adds their offensive and defensive rating for the player).

From the How it works tab-
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Player Ratings: We quantify the value of each player to his team on both offense and defense. A player's ratings incorporate his individual efficiency statistics, along with his impact on the court for his team, which is assessed by looking at how successful his team was in every possession he played. These ratings account for the strength of all other players on the floor with that player in each of his possessions that he played.
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Colgate had a fantastic run while Records was on the roster, dominating the Patriot League in each of his 4 seasons on the team. Guess it must believe he was a major factor in that.

I guess its not crazy for bigs to have so many of the top ratings, considering how impactful a good big is at the collegiate level.