Mark McGhee was manager of Wolves when Robbie burst onto the scene in the first game of season 1997-98 with two goals away to Norwich. It only seemed fitting that the Scot was present, if not altogether chuffed at first, when the livewire striker notched his century.
Robbie handed McGhee his match shirt after the game to mark the occasion and maybe soften the blow of Brighton's elimination.
"To be honest I didn't realise I had 99 until a got a text and was a bit surprised because I didn't think I had that many," reflected Robbie this week.
"Obviously it is great and, to score on Saturday against my old football manager who saw my first and now has seen my 100th, is nice. For him the result wasn't nice but he was very good to me afterwards and I presented him with my jersey."
With the magical 100 goals already under his belt, along with the Republic of Ireland goalscoring record, it is hard to believe that Robbie is still only 24. He reveals the lads have trouble believing this too...
"Yes, I am still young, although some of the lads - especially Jermain - say I am 24 going on 34 because I have been around for so long.
"It is nice like that, I would never have dreamed of having 100 club goals at 24 and it is great for me - and long may it continue."
Reaching the milestone so quickly is all the more remarkable for the fact that Robbie is hardly what you would describe as an out and out striker - or poacher - who racks up a number of scruffy goals from a few yards out.
"No, I am a second striker who plays off the main one, but I've been lucky enough to get a few goals at the clubs I've been at. At the moment it is going particularly well for me."
So which are the most treasured goals in the Keane Collection?
Obviously the one the other day is up there as one of my best, the one against Leeds for Spurs was also special to me. I scored an overhead kick for Leeds against Coventry, which was a good goal.
"I've scored different types of goals that I like. For Coventry I scored against Arsenal where I flicked it over Seaman's head, which I liked and got one against Barnet in the cup with another flick.
"I can't sit here and say I've got a favourite one or two - there are a number I have really enjoyed.
"I think everyone wants to see good goals, people will enjoy seeing the Brighton one and I certainly will! I like the cheeky ones too like the Birmingham one (pinching the ball from behind off Andy Marriott) and the one against Seaman.
"I don't mind the tap ins, but do like the cheeky ones."
Robbie Keane celebrated his 100th goal of his club career with the FA Cup winner against Brighton with a truly memorable effort against a team managed by the man who gave him his break in English football.