The nerve has to grow/repair itself and reinnervate (firing) the muscle it's attached to.
At this point the nerve should still be growing. However, there are so many ways this could turn out.
- The nerve could simply stop growing, never reaching the impacted muscle, leaving him with permanent "drop foot."
- The nerve could reinnervate the muscle fibers but at a lesser capacity meaning less function of the foot.
Him making a full recovery with something close to 100% function is a possibility, but folks should know that is not remotely a sure thing.
I went in a deep dive on message boards for people dealing specifically with peroneal nerve damage. Most of them gained some functionality to be able to do most activities like they used to. However, the need for an athlete to move effectively is much greater than a house mom kicking the soccer ball again with her kid in the backyard.