It never had any feathers.
Damnit people, stop being stupid.
There is NO SCIENTIFIC PROOF WHATSOEVER that could prove that the T-Rex had feathers, it's just another stupid "dinosaurs evolved into birds!" theory that is false and can be easily proven wrong, although evolutionists will deny that.
Yes. Paleontologists and scientists studying dinosaurs just pulled it out of their ass without any reason or scientific data, and you, with your middle school level of knowledge can dispute their reasoning, which you didn't even get correct, because of course scientists went to college to be shown up by a child on an internet forum about an indie lego game.
God you're loving stupid.
In 2004, the scientific journal Nature published a report describing an early tyrannosauroid, Dilong paradoxus, from the famous Yixian Formation of China. As with many other theropods discovered in the Yixian, the fossil skeleton was preserved with a coat of filamentous structures which are commonly recognized as the precursors of feathers. It has also been proposed that Tyrannosaurus and other closely related tyrannosaurids had such protofeathers. However, skin impressions from large tyrannosaurid specimens show mosaic scales.[68] While it is possible that protofeathers existed on parts of the body which have not been preserved, a lack of insulatory body covering is consistent with modern multi-ton mammals such as elephants, hippopotamus, and most species of rhinoceros. As an object increases in size, its ability to retain heat increases due to its decreasing surface area-to-volume ratio. Therefore, as large animals evolve in or disperse into warm climates, a coat of fur or feathers loses its selective advantage for thermal insulation and can instead become a disadvantage, as the insulation traps excess heat inside the body, possibly overheating the animal. Protofeathers may also have been secondarily lost during the evolution of large tyrannosaurids like Tyrannosaurus, especially in warm Cretaceous climates.[69]
If you're going to make an argument, do your loving research. While you are correct that it probably didn't have feathers later in life, your reasoning is inaccurate and your post is snarky and arrogant.