Something is up, @MyNameEhJeff
Would guess that's a backup for is Hadley or Kyle doesn't commit - but the odds seem to favor that he doesn't make it to campus at this point because Hadley and Kyle both commit before the 19th.
Looking closer at Jefferson's numbers - he's a true soph (like Kyle) and started all 26 games he played this year. He's between Hadley and Kyle in size, listed at 6'8" 220. His numbers are kind of scarily similar to Hadley's.
Hadley is 11.6pts, 6.0rbs, 2.4assts, 1.2 steals
Jefferson is 10.2pts, 6.5rbs, 2.3 assts, 1.2 steals
Although Hadley played ~8 minutes more per game. Jefferson struggled from deep, shooting 27%.