I view this problem a little differently. His biggest problem is that the team doesn't care to learn. As a lone wolf, he may also not be a suitable teacher.

I view this problem a little differently. His biggest problem is that the team doesn't care to learn. As a lone wolf, he may also not be a suitable teacher. But I've found the absolute best situation comes from being on a team where everyone wants to excel at their craft. When one member learns something, they pull the rest of the group to that knowledge. It also levels out knowledge a bit as you can always learn something your coworkers don't know.