"Labelled him" like it's some kind of comment that Kinnear made on him as a player or person.
"Decent player on the pitch but I've never seen the kid sleep once. That's because he doesn't do it. He just does not sleep. That's fucking creepy. I thought I'd play some of those managerial mind games that I'm renowned for, to snap him out of it. I called him Charles Insomnia. Next day, he requested a transfer. What can you do?"