Bear in mind squad announcements would be to the League by a certain time. Not necessarily a club's website.
Over here it's Tuesday afternoon.
In the NRL, if someone gets injured during the week, obviously they will be replaced and the relevant parties informed. IF, however, someone gets injured in warm up, it has to be verfied, by the doc AND the doc of the opposition that the injury will not allow a player to perform (muscle strain, tear etc.), then all parties are informed including the media/commentators.ground announcers.