Braves clinched the NL East. I don't see that team going anywhere in the playoffs though. They're good, but really beneficiaries of the Nationals having a terrible year and the Phillies dropping like a rock in August/September.
Going into the last week of the season, the only real races to watch for are in the NL West and NL Central, but the latter is probably going to get both wild cards so really Dodgers/Rockies might be the only do-or-die end of year race.
I suppose the AL West is still in play with the A's within 3.5 of Houston, but I doubt the Astros will drop that lead in a week and again, the loser gets a WC anyway.