It's time to move ahead with the ceiling and floor analysis, but we're still sticking with RB's. Under most circumstances, I generally wouldn't consider doing an analysis for a #3 RB. Why am I doing it now? Because there is a chance the #3 RB, Lamar Miller, could be the starting RB by the end of the season.
Miller was a player many Dolphin fans loved, but didn't expect to land in Miami. Why? Because he was viewed as a first round or second round pick and RB simply wasn't as big a need for the Dolphins. Well, Miller slipped and when he was still available in the fourth round, the Dolphins pounced at the chance to select him.
Floor: The floor is rather simple for Lamar Miller. There is always a chance a player will struggle, especially a rookie, but I don't think the floor for Miller would occur mostly because of struggling with his snaps. The low floor for Miller largely will depend on the effectiveness of Reggie Bush and to a lesser extent, Daniel Thomas. Injuries could also keep Miller down on Miami's depth chart and limit his opportunities. Still, he has areas he needs to work on such as his vision, but there is a very good chance Miller can and will an effective RB in the NFL. Stats: 20 carries, 65 yards, 0 TDs. No receptions.
Ceiling: There is definitely a very high ceiling for Miller, especially when you consider he was drafted in the fourth round. Bush and Thomas could struggle with Miami's new zone blocking scheme and both of them may be susceptible to injuries, giving Miller a chance to get carries and perform well enough that Miami won't want to put him back on the bench. He can be a terrific one-cut runner that thrives in a zone blocking scheme if he improves his vision. With his abilities, he could be the top RB in the 2012 draft class. The only reason why he may not be a rookie of the year candidate or have even more yards is because no matter what, there is a good chance he'll lose plenty of carries to Bush and/or Thomas. Stats: 175 carries, 805 yards, 8 TDs. 22 receptions, 150 yards, 3 TDs.