To entertain this, ATL could use their cap space on Hayward and then come back and trade Teague/Dedmon and Reddish to DMDR. That would probably give them a good enough core to be a playoff team going forward. If the Spurs are serious/able to trade Mills for Richardson, they could see Teague as a long-term fit to replace him (just as they might see Campazzo in that same light).
Murray, Teague,
White, Johnson, Walker
Richardson, Reddish, Woodard (41)
Okongwu (6), Gay, Samanic
Aldridge, Poeltl, Lyles
Might be best to trade Walker or White for a future pick to clean up the rotation a bit.