While 'Bama and Lawdog are correct, there are seven times that a captain or coach has a choice. Who can name 'em the quickest......
(7-man crew)
Without looking it up here's what I can come up with:
1. Following a touchback
2. Following a fair catch
3. Following an awarded fair catch
4. On the try following a TD
5. On the 1st play in a series during "extra time" (OT)
6. Spot for a free kick