A team, they say, is as strong as its reserves, and one of the reasons why Brooklyn finished third last year was young Johnny Hudson. Hudson, who plays either short, third or second, stepped in when called on and came through. He has been with Brooklyn, on and off, since 1936, and while not a house-on-fire with a bat, has always proved a dangerous man to whom to pitch. Last year, he drove in thirty-two runs for the Dodgers, and thirty-seven the year before. He is a fast, agile fielder, no matter what position he plays, and although he may ride the bench a lot, the fact that he is on hand in case of need is a happy thought for Manager Leo Durocher.