It's this year, yeah. Full list of eligibility
here.
Casas, German, Murphy, Rafaela, Valdez and Walter are locks to be added, I think.
Abreu, Bonaci, Hamilton, Jimenez and Paulino are all tough questions. Bonaci and Hamilton have good enough gloves that they'd probably be taken if exposed. Paulino has had a great year and corresponding rise but is still very young at 20 -- tough call there, but probably yes. Wikelman Gonzalez is the pitching version of this tier, still very young entering his age-21 season, but I think he probably gets added too. Abreu and Jimenez could go either way, but probably not both.
Politi, Wallace and Ward are all interesting arms that could probably help someone's bullpen, same for Bazardo and Kelly who are on the 26 now. Feltman is probably the odd man out.
Then there's Luis de la Rosa, Christian Koss, Eduardo Lopez, Naysbel Marcano and Noah Song, guys we want to keep but probably can't justify adding. (Ryan Fitzgerald has a .595 OPS since June 1 and won't be a factor.)
So that's maybe 11 or 12 players I could make a good case to keep, possibly more if Kelly and/or Bazardo look good this month. A good 3- or 4-for-1 trade or two will help sort this out.