USC needs depth. USC needs bodies. USC needs reinforcements. All of these things are true about the Trojans’ defense, including in the secondary. Zion Branch can give the Trojans what they need. Branch got injured in summer workouts before the 2022 college football season began. He was able to redshirt. It is worth noting that unlike a true freshman, he has been exposed to the program for a year. He knows what the coaches are asking of him and has been able to soak up the culture around the team. This isn’t a crash course; it’s a chance to apply…