Summary
Aminu signed a 3-year, $29 million contract with Orlando in 2019, and due to injuries has been unavailable during most of that time. Aminu only played in 18 games in '19-'20 and 23 games in '20-'21. Aminu was waived prior to the '21-'22 season and did not play for an NBA team.

Unless he can prove that he's healthy, I'm not sure that any team will even give him a chance as a free agent. At age 31, and with his recent injury history, there are no guarantees he can even be available on a consistent basis, let alone actually contribute to winning.

It's not that long ago that Aminu was starting for a successful Blazers team as a combo forward that could defend multiple positions. Aminu's lack of shot-making ability hurt him in the playoffs, but he hit enough during the regular season to at least keep defenses somewhat honest.

Some teams may give him a chance to earn a roster spot in training camp, but I would be surprised if he got more interest than that.
 
Cap Considerations
Aminu was waived by the Spurs prior to the '21-'22 season. Teams will have multiple ways to sign Aminu as even teams without cap space could possibly use any of the Non-Taxpayer MLE, Taxpayer MLE, or even the Room MLE or Bi-Annual Exception to sign him. It's also likely that Aminu only gets minimum offers, and most likely wouldn't get fully-guaranteed offers.