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NASHVILLE, Tenn. —** The Titans are off to a slow start, and quarterback Marcus Mariota has turned in better stretches in his short NFL career.

Mariota isn't happy about it, because he wants more wins.

But don't expect him to get down on himself.

"It's fine,'' Mariota said when asked about his confidence level after today's practice. "My mentality hasn't changed, and it won't change no matter what our record is. I am always focused on getting better and improving each and every single day and just getting better week after week."

The Titans (1-3) are scheduled to face the Dolphins (1-3) on Sunday in at Hard Rock Stadium.

Through four games, Mariota has completed 80-of-136 passes for 925 yards and four touchdowns, along with five interceptions.

Titans coach Mike Mularkey said Mariota has remained positive, and upbeat. And that's a good thing, he said.

"I haven't seen anything really weigh on him,'' Mularkey said of Mariota. "Some of the things that's happened to him even in some of these games, there's numerous times he could have allowed it to happen. I haven't seen it happen since I've been here with him. … He's on to the next thing.

"We all have to get better, not just Marcus. There's guys who can help him be better, including the coaching staff, myself, his teammates. There's a lot of things that will help him get better, including him."

Mariota said on Wednesday he can be more aggressive with his feet, and he plans to keep his feet moving in the pocket. Mariota has said he's focusing on cutting back on his turnovers.

But Mariota said he plans to keep working. Developing better chemistry with his receivers will come, Mariota said. Some of the Titans receivers said in the locker room it's a work in progress.

"I do think of myself as a perfectionist,'' Mariota said. "Any little thing, any little detail that is not in place or is not right it does kind of bother me a little bit. But that is part of it, part of my mental makeup, and I think that is kind of what has gotten me here.

"So for me, it is learning how to correct those things so that everything can be perfect. You are never going to have a perfect game, but if you strive for that you can execute and do things the right way.

"Everyone would love to go in and each week throw for 300 yards and five touchdowns, but that is not realistic," Mariota continued. "And that is part of it. I have to learn to continue to learn and grow. I can learn from games and find ways to improve. But no matter what all we want to do is win, I don't care what the stat-line is. For me, as long as we win it doesn't matter what (stats) I put up or how many touchdowns I throw."