NASHVILLE—When Mark Byington thinks of Sebastian Williams-Adams and what he can do as a Vanderbilt basketball player, Williams-Adams wearing a JL3 Elite jersey comes to mind. That version–the AAU one–of Williams-Adams was among the best defenders on the floor at all times, but also put together stretches of dominant face-up play on the offensive end. Williams-Adams averaged 13.1 points per game that summer while shooting 48.9% from the field and going for a high of 41 points.  Vanderbilt was a real contender in that high school recruitment, but ultimately came up just short due to its lack of proof of concept at that stage.…