NFL Training Camp: Top 5 position battles around the league

3. Miami Dolphins, Moreno or Miller?

Former Denver Broncos running back Knowshon Moreno was brought in to provide depth and competition in the Miami backfield.

Moreno was coming off his best season, with 241 carries for 1,038 yards and 10 touchdowns last year in Denver. But it’s a lot easier to put up big numbers in Denver’s offense than it will be in Miami’s offense. To complicate matters worse for Moreno, it was reported that he showed up to Dolphins OTA’s out of shape.

Meanwhile, Lamar Miller almost seems extra motivated by the Dolphins signing of Moreno.

"“He’s had a very good camp,” Dolphins head coach Joe Philbin said of Miller, via ESPN. “This is the time as a third-year player that you’re ready to make a big contribution.”"

Reporters on the scene have described Miller as looking like a better fit in new coordinator Bill Lazor’s offense, and have described Moreno as looking a little overweight. When the Dolphins signed Moreno it was with the idea that he’d come in and replace Miller as the starter, but that no longer appears to be the case.