Just watched the Zac Seljaas BYUSN interview . . . good stuff.
He isn't having surgery on his shoulder but is doing physical therapy almost every day. He is already working out and getting shots up. He mentioned he got to shoot quite a bit on his mission, and that he is as good of a shooter as when he left.
Zac won't have the typical RM recovery time seeing as he was only out 10 months. The entire interview is here: