Miami Legacy Curiosity

I was listening to ESPNU Sirius84 while driving around this afternoon. Bobby Carpenter, Rob’s oldest son was co-hosting. He mentioned something about one of his brothers playing for Ohio. When I got home I googled Rob and found out each of his four boys played FBS football - Bobby, of course, at TOSU. His other three brothers each played at Miami’s rivals: Ohio, Marshall and UC. That seems pretty strange. Anyone know the back story. Rob’s in the Miami HOF.