people have played both ways in high school for a long time.
some of the most famous recruiting gaffes of all time are from this problem.
all the major programs recruited marshall faulk to play defensive back.
marshall faulk decided to play halfback at san diego state.
joe paterno wanted jim kelly to play linebacker at penn state. jim kelly went to miami to play quarterback.
etc, etc, etc.
and one closer to home.. Jason Witten played DE/ TE, was recruited to play DE