Southampton have had plenty of managers over the years, with varying degrees of success. Some have been at the club for long extended periods, while others have been shown the door after only a brief time in charge. However, there is only one that has guided the Saints to a major trophy to date. That is of course, Lawrie McMenemy. Back in 1976, Southampton stunned Manchester United 1-0 in the FA Cup final, to lift a major trophy for the only time in their history to date. At the time, the Saints were still a second-tier team, and United had been the clear favourites to claim the trophy. McMene…