There have been questions about whether Jay Ajayi can handle a heavy workload, but the Miami Dolphins running back doesn't lack self confidence.

"Everyone else has opinions on what I can do and if I'm worthy enough, and I know how good I am," Ajayi said. "I know how great I can be. That's my mentality coming in, day in and day out -- to work, so that when I step out on that field, I can produce the way I know that I can and be the great back that I know I can be."

Ajayi is expected to enter the season as Miami's starter after rushing just 187 yards on 49 attempts over nine games as a rookie.

"I feel like the game has definitely slowed down a lot more for me," Ajayi said. "It's now working on the details, working on consistency. That's really what I'm harping on -- being a lot more consistent with my game."