A 4.58 time in the 40 for a one-cut runner is plenty fast as it is.
Now that he's going into his senior year, with a year+ of strength, conditioning, and growth (he's got plenty of room to grow), I'd have to guess that it's an excellent chance that he's shaved at least a half a tenth of second, maybe a whole tenth of a second, off his 40 yard dash time.
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