"We had a lot of seniors telling us that it was going to be hard to do it again this year," York said. "For some of us, having an undefeated conference record is something that is very special. It is something that you are going to be able to talk about later in your life. Coach always talks about how once you get old, that is something that you cherish more and more.
"I don't think it is something that we are taking for granted. We're coming to practice every day and we're looking forward to the next game. We're happy with being ranked number one, but we know we have to focus on the next game."
York is coming off a season in which he was not a contributor and now finds himself as one of the main players off the bench.
"Honestly it is more of a mental thing, saying I have to play better defense if I want to play in a game," he said. "I think it's also the fact that having an extra year of playing college basketball, I got used to it a little bit. The pace of the game and the overall mentality of it. I think it was more of a mentality than anything."
When discussing the changes in Arizona from last year to this year, York also mentioned a slight change in coaching as it relates to defense.
"Last year there were some players that were able to get away with some things throughout the course of the year," he said. "Coach talked about it at the beginning of the year, that he was not going to make the same mistake twice and that around this time is when our team started to disintegrate and started to part ways.
"This year he said he is not going to let that happen and we all have a common goal and he is going to make sure that he is going to keep his side of the bargain. He is going to be someone that holds you responsible for whatever it is you do and no matter who you are and last year it was a little shaky at points. He was the first one to admit that and this year he told everybody he was not going to let that happen."
Those changes and other factors have York and his teammates ready for the rest of the Pac-12 season and a matchup with Colorado on Thursday.
"As a basketball player, you watch Sportscenter and you keep up with everything, especially in the Pac-12," York said. "It is something that we're not going to look over a team. Like Colorado with Spencer Dinwiddie's injury, they are still a great team that has great players that are going to rally around him and they are going to try to play extra hard just for him. I think in the Pac-12 you can never take anything lightly."