Playoff roster building is a little different and sometimes the last spot or two is a niche PR type or defensive type role. So I think Hamilton is pretty safe. Perkins, no way, just doesn’t offer enough. Same with Rengifo. He probably won’t even last that long on the roster.
Ortiz has been their ride or die at SS for 2 and a half seasons now so I don’t see that changing unless they make a deadline move for a SS or unless Pratt comes up and rakes with the same defense.
With Sanchez, they need a backup catcher, so barring a trade for one, I don’t see enough difference between Sanchez and Quero to pull the trigger.
Pitching staff is where it gets interesting and a lot of these guys at the bottom will be upgraded especially in the playoffs where you can afford deeper benches with more days off.
Of the current 26, I’d say Chourio, Yelich, Turang, Contreras, Miz, Harrison, Megill, Uribe, Ashby, and Patrick are locks, with Vaughn, Bauers, Ortiz, Frelick, Hamilton, Mitchell, Lockridge, Sanchez, Anderson, Henderson, Hall and Drohan all looking like the high side of likely to varying degrees. Good chance one or more of the 22 names above will be traded, injured to end the season, or drop off enough to lose consideration, so this is all just early speculation.
If it held, it leaves only 4 spots for some combination of Woodruff, Priester, Sproat, Lara, Pratt and Jett — and the rest guys that we have yet to acquire.