Yep - there's 6 teams battling for 3 spots, and they will be the #2, #3, and #6 seeds, so it is true and locked in that the best 3 teams will be facing each other (the #1, #4, and #5 slots).
One of the 6 teams I'm counting in this is Baltimore, who is next up for the Brewers. They would have to hop over three teams, but the current 3rd WC White Sox magic number on them is a not-so-sure-thing 8 with 9 to play and the Blue Jays and Rangers are head-to-head this weekend - it will take some help, but it's not that unrealistic if they can somehow get at least a couple from the Crew.