Indeed, the former Tottenham defender, who has also turned out for Liverpool, Southampton, West Ham, Crystal Palace and more, says Arsenal are his 'least favourite football club' and admits it is 'absolutely awful' for him when the north London side win things.
Ruddock's bias comes from his time at Spurs and it has led him to hope Aston Villa can 'stuff' Arsene Wenger's side at Wembley on Saturday.
Wenger's men will go into the showpiece event as favourites on paper but their most recent cup-final experiences present both the advantages and disadvantages of such a situation.
Last season, Arsenal came back from 2-0 down to beat Hull City as favourites in the final - but an infamous meltdown against Birmingham in the 2011 Carling Cup still lives in the memory.
The former Tottenham man wrote: "It's the FA Cup final this weekend between Arsenal and Aston Villa. Arsenal are my least favourite football club of all.
"For me, being an ex-Tottenham player, it's absolutely awful when Arsenal win things. I know a lot of Arsenal fans and they think they invented the game!
"One my favourite FA Cup moments was from this year when Bradford ran riot over Chelsea. Hopefully Villa will take some heart from that and stuff Arsenal this weekend. Go on the Villa!"
The Gunners head into today's clash after beating Reading in the semi-final, a win that followed a triumph at Old Trafford in the FA Cup quarter-finals.
Tottenham's run in the competition was ended by Leicester City, when boss Mauricio Pochettino played a weakened team at White Hart Lane and was punished by Nigel Pearson's men after a Michel Vorm error.