He don't get injured because he play once a week and the training Is not intense like at arsenal and you don't have a game every 3 days. We done well to loan him.
Amazing how many people overlook this. Once Jack is back I assume he will play a similar number of games a week but the big gain from going out on loan was him being able to build his workload without the pressure of performing right away. Thats why I'm confident he won't miss to long a periods once he returns.