I understood that Chambers needed a 21 on his math section, which he got. His overall score may have been higher.
That being said, I think 21 is more of a preferred cutoff, rather than a hard a fast one; I know at least two people whose composite score was lower than a 21.
That Chambers qualified through the front door is to be commended. I discussed this issue with someone who would know, and he insisted that Chambers could have enrolled "as is," but with some effort (my guess at translation would be "a letter of recommendation from Bronco"

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Chambers is proving that he belongs in Provo at every turn.