However, in his time in charge at Old Trafford, he only made a small number of raids on clubs in the top flight in his homeland for senior recruits.
This week's trivia question was:
Name four players signed from SPL clubs by Sir Alex Ferguson during his reign at United.
Please note that we are not counting youth players - such as David Gray - only those who had made a senior appearance in Scotland.
Check out the answers in the black box.
Brian McClair (Celtic)
Jim Leighton (Aberdeen)
Andy Goram (Motherwell)
Liam Miller (Celtic)