"It's massive that we keep Sunderland in the Premier League," said Leadbitter. "It's all about staying in this league and I'd like to think we're all going to do everything possible to make sure it happens.
"As a player who experienced it, it is in the back of your mind, you don't want it to happen again, but it's all about this team sticking together with the staff and doing well.
"It's not about the first two years, it doesn't matter how you're doing it, you've just got to stay in it, make sure you're an established Premier League team and over the last 10 years Sunderland haven't been that.
"They have been up and down, yo-yoing, and it hasn't been good as a fan or a player or anyone connected with the club."