Thanks for the replies. Unfortunately, I had worked something out the hard way before I saw them. Tell me what you think if you don't mind. I've never done this so I might be missing something.
I divided the group into two divisions of 9 that each play a full round robin. This gives each team 8 games in division. I then gave each team four games against teams from the other division:
Team 1 plays 10,11,12,13
Team 2 plays 11,12,13,14
Team 3 plays 12,13,14,15
Team 4 plays 13,14,15,16 (this completes adding 4 games to team 13)
Team 5 plays 14,15,16,17 (this completes adding 4 games to team 14)
Team 6 plays 15,16,17,10 (this completes adding 4 games to team 15)
Team 7 plays 16,17,10,11 (this completes adding 4 games to team 16)
Team 8 plays 17,10,11,12 (this completes adding 4 games to team 17)