He insists that this period, one that sees him top the Opta goalkeeping charts, is not the first time where he feels he is approaching the top of his game.
"I've had pretty good spells throughout," he recalled. "I remember I came in at one stage at Leicester and in a week we beat Leeds at home 1-0, 0-0 at home to Man Utd and then I was in the USA team that beat Brazil 1-0.
"I've been pretty fortunate with spells. This is a good run and I had some good runs in Spain too.
"What is nice about this one is and kinda what I've felt over the last few years is that I've been very, very happy with my training.
"When I'm happy with that I think it shows on the field. There were times earlier in my career when it was tough. At Millwall we didn't have a goalkeeping coach so you were struggling to find time to get the right training.
"When a little technical thing went wrong you're trying to figure it out yourself. It's like going to the driving range, hitting balls and saying 'well that wasn't right', but how do you fix something without someone telling you?."
Nowadays Kasey is expertly drilled on the training ground by coach Hans Segers and consultant Pat Jennings.
"Now, when you do something wrong once or twice in training you can fix it very quickly and you don't get to a stage where you're kinda chasing things.
"In Spain and here I feel that technically things are right on line and I haven't had those times when you feel that things don't feel right.
"A lot of that is down to the coaching that I've been getting. You don't have to iron things out - when you've done it once or twice - it's gone.
"Hans might say 'you did this' and I just won't do it again. Then you don't and it makes it so much easier than chasing it and thinking 'what am I doing wrong?'"
Kasey Keller attributes his remarkable form to feeling good about his training and the coaching he receives.