Horford on signing his extension:
"For me, I really did want to be a part of what we have going here," Horford said after the Celtics held a shootaround at their practice facility ahead of Friday night's game against the Miami Heat. "I felt like me coming back here last year, I felt the strides the group started to make and we've continued to make strides in the right direction.
"I feel like there's a real purpose of trying to win and the group that we have is just a really good group. So, I'm happy and we know we have a lot of work ahead. But this type of stability, it's hard to find."
"One of the things is, more than anything, you want to be in a place where you have a chance to contend, to win," Horford said. "A place that's, for me, more than basketball. Boston, I feel a real connection here with the people and with what the Celtics are all about, and it's something that just really excited me. And the fact that I get that opportunity and Brad believing in me and bringing me here, it's something that's special, and I'm really grateful for the opportunity."
"I think this was something that was going to happen at some point or another," Horford said when asked if extension talks had been in the works. "Like I said, there were different things that the team had to deal with and things like that. There was really no urgency, per se, but I wanted to make sure that this didn't drag out until free agency and the summer and all those things and just once the time was right, to work this out and just focus on the season."