The Arizona Cardinals offense does not yet have the type of balance that can support a consistently good ground game.
Williams did have the best game of his career in Week 3 against the Philadelphia Eagles, rushing for 83 yards on 13 carries, but it may take time before he starts rushing for more than 100 yards per game.
Arizona needs Kevin Kolb and the passing game to become competent in order for defenses to respect the aerial game and move some defenders away from the box and the line of scrimmage.
The Cardinals are passing for a mere 181 yards per game, and that is simply not good enough to support any kind of ground game, regardless of who is in the backfield.
However, there is serious potential for Arizona's offense, especially if its defense can continue to play at such an extremely high level.
The Cardinals have allowed just 40 points through three games, and that means they do not have to dedicate any time to playing pass-happy catch-up in contests.
The offense can develop organically and produce the type of balance required to succeed on the off chance that the defense does not bring their A-game at some point this season.
And Williams is the type of underrated running back that can break out once given the proper opportunity.
His skill has been glimpsed already through three games, but the 5'9", 207-pound RB has yet to truly explode and became a viable fantasy threat.
So far, the team has split carries between Williams and Wells, but with Wells out, Williams' carries will double, and he will be able to get better within the framework of the offense.
Williams has admitted that fears of re-injuring the knee that kept him out his entire rookie season crept into his mind early in the year, but more carries and more production will only help him to move on from those worries.
Williams has the potential to be a great—possibly elite—running back in the NFL. Fantasy owners need to be patient and let him come into his own as this season continues.
The Cardinals are good enough and Williams has too much talent to not wait for him to break out.