In the 12 years since Sir Alex Ferguson retired, Manchester United have spent billions on many players, most of whom have not worked out. Most of these were signed by Ed Woodward and his mad seven-year spell where players overstayed their welcome after becoming ill-advised signings. Even the players who came as highly-rated found themselves lost in the upheaval at United and would never reach the same heights again. One such player who joined in the frantic summer of 2015 has now announced his retirement, with Anthony Martial emerging from the shadows to send him a five-word message. Morgan Sc…