"Teams" do not provide officials for games. In the NCAA, conferences are responsible for providing officials for games.
In Division I-FBS, all conferences field seven officials for each game with the exception of the Big 12. The Big 12 experimented with adding an eighth official during the 2013 season.
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I am not sure but i think that many of them will not play college soccer for most just play at that age for something to entertain themselves with
there are 4 different officials in badminton
Yes, many college football games, MLB baseball games, and soccer games
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Seven
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A typical soccer game uses one ball.