Matt Busby, perhaps the greatest football (soccer) manager in the history of the British game, played for Liverpool FC!
I did know that Busby was Scottish, one of the famous trio of Scottish football managing superstars who escaped from mining backgrounds through the beautiful game. Check out Jock Stein and Bill Shankly for the other two members of that select club.
There are other great Scottish football managers. Kenny Dalglish, Alex Ferguson, and Walter Smith would make my list of the top six.