Celtics point guard Terry Rozier has spent his first few seasons in the NBA backing up Isaiah Thomas then Kyrie Irving and establishing a trade value that has become a running joke. But Rozier has bigger goals. Rozier, via NBC Sports Boston: I know, in the future, I want to be a starter. I’m going to be a starter. I came in. I played after Isaiah Thomas, and I’m playing after Kyrie now, and that’s the only reason I don’t start. That’s how I’m looking at it. But I know I’ll be a starter in this league. There’s a fine line between a player driven by ambition and one who isn’t willing to accept his role. I’m not sure where Rozier falls. The Celtics should try to figure it out. Rozier will be eligible for a contract extension next summer, so it might actually be time to deal him before the trade deadline.