This is the second article in a series previewing the top NFL prospects by position for the 2010 draft.

This year's RB class features two dynamic runners — Clemson senior C.J. Spiller and California junior Jahvid Best — and a solid but unspectacular group of big backs, led by Georgia Tech junior Jonathan Dwyer. Spiller is a game changer with good hands — if he can stay healthy in the pros, he could become a Pro Bowl-type talent. The inability of Reggie Bush to change games in the pros the same way he did in college, however, has forced teams to view multipurpose backs in a different vein, and it's possible no back is drafted in the top 10 again this year.

Note: "e" indicates the height, weight or 40-time is estimated.

SENIORS

1. C.J. Spiller, Clemson
5-11e, 195e, 4.3e

An electric talent with rare acceleration, Spiller is a game-breaking runner and returner capable of flipping the field every time he touches the ball. With the exception of maybe Titans RB Chris Johnson, there is not another runner in the NFL as field-fast as Spiller, and he will change games out of the gate upon his arrival. His draft value could be affected by two factors — he is not built to be an every-down back, and durability issues have lingered throughout his career and could keep him from ever being more than a dynamic complementary back. However, he will change games for a creative offensive coordinator who knows how to maximize his talent and can be a big-play maker in multiple phases.