Complex sentence: Lynch's son, Billy, is the wide receivers coach at Indiana University, another son, Joey, is the wide receivers coach at Ball State, and his youngest son Kevin is the wide receivers coach at the University of Indianapolis.
Split into simpler sentences: Lynch's son, Billy, is the wide receivers coach at Indiana University. Another son, Joey, is the wide receivers coach at Ball State, and his youngest son Kevin is the wide receivers coach at the University of Indianapolis.