"I have been working hard in the offseason," Brown said. "I've kind of got that in the back of my mind that I will have to take on the duty of carrying the load a little bit more, but I'm excited about it."
This is something new for Brown, who shared carries with Cadillac Williams at Auburn and with Ricky Williams last season.
But you won't find too many folks around Dolphins camp who doubt that Brown will be able to handle the increased workload.
And that goes for Brown.
"I'm excited about it," Brown said. "Like I said, it's the first time that I actually get the opportunity to start the season off with having to carry the load. I did it one season in college, but I don't think you can really compare that to this level.
"I was kind of disappointed in the fact that something like that (Williams getting suspended) happened, but at the same time I was excited about getting the opportunity to do a few more things and being asked to do a little more on the offensive side of the ball."
For one thing, Brown feels more confidence after a rookie season where he rushed for over 900 yards and had one of the most sensational plays of the NFL season with his 64-yard touchdown run against Kansas City.
It also helps that Brown will be in training camp from the start this summer, as opposed to last year when he was out until the middle of the preseason because he hadn't signed his contract yet.
"Last year, unfortunately I missed camp and I think that slowed me down a little bit, but this year I have had a pretty good start, been through the offseason and things looks pretty good," Brown said. "I feel pretty good, so I'm excited to see what happens.
"Yeah, I am a little bit more confident. I think it just comes with being a little bit more comfortable going into my second year. I got the feel of how things work and everything is going pretty smooth. I don't have to worry about too much."
The Dolphins also hope they don't have to worry about their running game. The way Brown is looking these days, they won't have to.