The 23-year-old is currently a free agent after leaving Swindon Town at the end of last season, mainly due to disciplinary problems and off-field issues.
The former Newcastle United striker has been dogged by controversy throughout his career after making his professional debut five years ago.
But Sky sources have been told that Leeds head coach Dave Hockaday and his assistant Junior Lewis are ready to take a look a Ranger in the coming weeks with a view to possibly signing him.
Ranger, who is a former England youth international, scored seven times in 19 appearances for Swindon last season.
A player and club that are well suited to each other.- hurler