Elder wasn't a big time basketball recruit, so I'd expect that experiment to be short lived. Griffin is a legit prospect in both, but it's extremely hard to pull off both. Maybe for a season or two, but then he'll probably have to choose.
Justin Gage, Nate Robinson & Antwaan Randle El are some others that have done it. Texas A&M had 2 play both in the same season - Jerrod Johnson & Martellus Bennett.
The last recruit I can think of who was expected to not just play, but excel at both was Ronald Curry at UNC.
Elder was a 3 star point guard who led his team to a state championship . He will be more than an afterthought in BBALL