Kasey, it could be said, led the resistance when we held out for a point against a swashbuckling City at the end of September. The USA international made at least six stunning stops - including four one-on-ones with Paulo Wanchope - to defy City and deposit a point in our Premiership account.
It is for that reason only that Kasey says the game will stick in his mind.
"It was a nice game and it is nice to come away from a game like that with reward - and that doesn't happen a whole lot," reflected Kasey, preparing to face City again in the Carling Cup at the Lane on Wednesday.
"A lot of times you lose a game like that 2-0 so that is why it registers as memorable - the fact that you've done something that's helped your team get something on the board."
Kasey is not lulled into any false sense of security by City's recent results thanks to a conversation on Sunday with USA teammate Claudio Reyna, who filled him in with the details of the reverse to Middlesbrough.
"I spoke a little bit with Claudio last night and they crushed Middlesbrough. Similar if not worse to when we played there, the number of chances they had was phenomenal.
"It happens sometimes, teams that score a lot of goals for a few weeks then don't score any but are still creating the chances and are a very dangerous team. Some team soon will take a good hiding from them and we've got to make sure it's not us.
"City are a good, attack-minded team who are not going to grind out too many 1-0 results. The key is to not allow them to get in their stride because if they do you are in for a long day."
With Manchester City, unbelievably, without a goal in their last four games - perhaps the last man they want to see in front of them is a certain Kasey Keller.