Which league can release players without further pay?
Uh....the NFL like I just said...hello?
I wanted to clarify because that statement is not really true, and I don't know about how other leagues work. In most cases it probably is true that cut players don't get paid any more, but there have been more and more contracts recently with large guaranteed portions. Kirk Cousins' supposedly fully guaranteed contract with the Vikings is a glaring example, but players like Matt Ryan, Aaron Rodgers, Khalil Mack, and others have gotten contracts with guaranteed money beyond simple signing bonuses, as I understand it.
I wouldn't be surprised if the same is true of the other major sports leagues, in general; that the top players have the sorts of guarantees that keep them getting paid even if they are cut, while most of the other players don't have those sorts of guarantees in their contracts. I don't know, however. Maybe most basketball or baseball contracts have a lot of guaranteed money.