This is a bigger deal than most people think. If it's somewhat disfigured and took that long to heal it was injured worse than GB let on. I have a long history of injury from the knees down and based on that alone he's going to be at risk to injure that calf going forward. (once you suffer a severe injury like that it never seems to be the same)
They have to emphasize stretching and warm up for him going forward and for god sake don't baseball slide and lead with that leg !