"Obviously, I believe I'm an NHL player," O'Brien told the Calgary Herald. "So I've got to work hard, play hard. Hopefully, some teams see me and are willing to give me another chance. I'm only 30 years old, so I feel I've got a couple good years left in me, anyway.
"Obviously, I realize I'm a (team's fifth or sixth defenseman) and I'm going to play against the bigger, tougher lines. I'm OK with that.
"I feel that I can be a regular in the NHL again."
O'Brien had a feeling from the start of the season that he wasn't exactly in the Flames' coaching staff's good books.
"You could tell by the ice time where I stood in their minds," he said. "I don't think it's anything personal. I don't think (coach) Bob (Hartley) thinks I'm a bad guy, but, obviously, he doesn't think I'm a very good player. Same with (associate coach) Jacques Cloutier. From Day 1, they didn't think I could play on their team.
"Hopefully, I can get a chance somewhere else and prove them wrong."
O'Brien has one-year left on his contract, beyond this season, with a salary cap hit of $2 million.
According to the Herald, Flames President of Hockey Operations Brian Burke told O'Brien that he will continue to try to trade him
The NHL trade deadline is March 5, and O'Brien is one of multiple Flames who could be moved by then. Forwards Mike Cammalleri and Lee Stempniak are also supposed to be on the move.