Sounds like a smart guy to me. As long as he shows up to work on time and does his job and works hard I wouldn't worry about it. I would like this guy to transfer to my hub. Feel lucky to have such a hard worker. I'm a picker on my belt and just two days ago when the belt started, all we had was me and the other picker. It was like that for 15 min until a couple guys finally showed up. The bad part was they are the two worse loaders on our belt but at least they showed up.
I can see how him not being social can make it a long day, but they don't pay us to talk they pay us to get the boxes to their where they need to go as fast as we can get them there, with out tearing the up. I do hope that he come around and I'm sure he will eventually but give him his space.