Amar'e Stoudemire's interest in an NBA comeback is definitely mutual ... 'cause the All Star says his workout in Vegas went well, with about half the league showin' up to check him out!!
Oh yeah .. and he's got an update on that epic interaction with a heckler in his Instagram DMs.
But back to the workout ... STAT and Monta Ellis worked out for multiple teams -- including the Lakers, Warriors and Knicks -- last week ... and he says it couldn't have gone better!!
"It went good, man." Amar'e tells us.