We are counting Wes Brown, the extremely versatile John O'Shea and Mikael Silvestre as central defenders, but not Luke Shaw, even though he is currently playing that role after making his name as a left-back.
Rio Ferdinand, 20th overall when it comes to representing the Reds, leads this particular chart with 455 outings under his belt, ahead of the famed first Premier League title-winning partners Gary Pallister and Steve Bruce.
Maguire is now joint-89th, with Stewart Houston, when it comes to the full list and he is on 169 league appearances for the club.