The American international played every minute of all 45 games last term to add to his clean sweep of 41 in 2002-03.
Add the final seven games of 2001-02 and the 34-year-old has played 93 consecutive games.
"Not many keepers will go one season without missing a game because the pressure is big, the training is hard so to go through one is quite hard and two is amazing," said coach Hans.
"I'm very pleased for him. He was our only senior goalkeeper and we're lucky he hasn't been injured because we could have had a problem.
"We had a couple of youngsters on the bench in Rob Burch and Lars Hirschfeld and it was good experience for them as well, so I'm pleased with how it's all worked out."
So what did he make of Kasey's performances? "For me, he made less mistakes than the season before.
"In the season before he was coming out more for crosses and for corners and that's probably my fault because I told him to be careful and not come out for everything.
"So there were less mistakes, less adventurous, but overall very pleasing. He made one or two mistakes, not technical mistakes, but more decision making. If you can count on one hand the mistakes from one season you've done well."
Hans Segers described Kasey Keller's feat of completing two ever-present seasons as 'amazing'.