BOSTON — Glen Davis was lost, and now he’s found.

If you’ll recall, at the start of the preseason, Big Baby told reporters:

“I’ve got to find out what my role is. With Rasheed Wallace last year, I had to become a center. Now? I don’t know. Do I go back to playing the 4? We’ll see.

“It’s difficult because, as a player, you kind of don’t understand where the Celtics are going or what they are doing. No matter what I do – I can play great – it’s still not enough. I’m just here to help the team wherever possible, any way I can. Whenever I find my role, I’ll do it to the max, the only way I can.”

Now? He wishes he could take it all back. He knows his role now, after Doc Rivers pulled him aside, telling him to “shut up and play,” and Danny Ainge helped define his role — as a versatile big man off the bench who can play the 4 and the 5.

“I don’t even know why I made that comment,” Davis told reporters after last night’s preseason win over the Nets. “You guys have to help me out when I make stupid comments.”

Davis went as far as saying, “I’m a lucky big man to be on this team,” citing the experience he’s gained in a few years alongside veterans like Kevin Garnett, Rasheed Wallace, Shaquille O’Neal and Jermaine O’Neal.

After a poor first half as a team that left the Celtics trailing 55-48 going into the locker room, Davis and Shaq had a pointed discussion at the bench.

“We were just communicating with each other, making sure we were on the same page,” said Davis. “We have to do it a lot, because he really doesn’t know our defensive system. Me being here for four years now, I know it. So, I’m just trying to help him out, making sure he’s there when the rotations need to made.”