The prize is voted for by the club's supporters, and runs alongside the Players' Player-of-the-Year award.
The current holder of the accolade is left-back Luke Shaw, who triumphed across both categories for the 2018/19 season. Luke took the trophy from record winner David De Gea, whose success in 2017/18 was his fourth win in just five years.
Before the Spaniard, the most frequent claimant of the Sir Matt Busby Player-of-the-Year award was Cristiano Ronaldo, who emerged as the club's outstanding player in 2004, 2007 and 2008.
Beyond Ronaldo, there are five players tied on two gongs each: McClair, Eric Cantona, Roy Keane, Ruud van Nistelrooy and Wayne Rooney.