The Jai mentioned in that tweet is likely Jai Newcombe.
It can get a bit confusing at times when the full name is not used. There's two CMac's for example - Macdonald and Mackenzie (plus a BMac), and 13 players in the squad with a first initial of J (James x 3, Josh/Joshua x 4, Jai x 2, Jack x 2, Jacob and Jarman). Not to mention a few Ned's, a few Max's, a few Mitchell's (even after trading one), a few Sam's etc.