MidloDad knows the exact story, but a catcher from the local HS was at beach week after graduation and got a call from an ACC program. Apparently the MLB draft took more players than planned, and after the coach made a few contact calls, this player was going from a D3 to an ACC (at the time) school. He was on a 5 year plan and got drafted.
Footnotes: his HS team had just won the state championship. He was drafted in the 39th round and played 2 seasons in the minors and 1 independent.