My assumption is that JF will experiment with the roster in subtle ways. He wants to win the AL East of course and even to get home field advantage, but the lineups he uses during the next 6 games should hint at who will make the playoff roster. Most players are settled already of course, but it is the fringe players who will be chosen late who we are looking at.
As said earlier in this thread, it is a choice from the three catchers, Hill, Hernandez, and Moncada for field players. In the pitching area it may be a choice between Scott and Abad and Kelly is probably in so Barnes may not make it and Hembree had a good night recently but he or Tazawa may not make it. With 11 pitchers it is pretty restrictive.
Price, Porcello, Pomeranz, Buchholz, Kimbrell, Uehara, Ross and Ziegler look like locks so there is room for. Kelly, (Scott, Abad, Henbree, Barnes, Tazawa). Maybe JF will go with 12 pitchers to ease the choice a little.