DETROIT, Oct 27 - Pre-game: The Fall Classic shifts to a chilly Motor City with Detroit Tigers trailing the San Francisco Giants 2-0. San Francisco took the opening game of the best-of-seven series 8-3 and followed up with a 2-0 win in Game Two. Games Three, Four and Five, if necessary are scheduled for Comerica Park. This is what the rival managers said just before the game. Jim Leyland (Tigers): "I am just grumpy once in a while because you have to be grumpy or sometimes you guys don't get the message. So everybody thinks I'm a grumpy old man. I'm old but I'm not grumpy. ...