Baltimore Ravens running back Ray Rice comes in at #56 on the NFL List of the Top 100 Players of 2011. Rice's video highlights are introduced by Jacksonville Jaguars RB Maurice Jones-Drew, who like Rice, is one of the smaller yet tougher running backs in the league. At the end of the video, MJD says while Rice is similar to him, he still is prettier than Ray.
Both guys, while diminutive in size, make up for it with great moves and a punishing stiff-arm, and if you think you are just going to arm-tackle these two bowling balls, you're going to be laying on the ground watching them running down the field after the slip out of your grasp.
If you are lucky enough to hit Rice hard, watch him just put his hand on the ground to stabilize his low center of gravity, then turn a short gain into a back-breaking TD run. Rice is the key to the Ravens offense, both in the running game as well as the passing game, keeping linebackers from either pass rushing or dropping too far back into coverage.
Rice has proved too fast for linebackers to cover and tackle in open space and tough to bring down if matched up against the smaller defensive backs. Either way, as goes Ray Rice, usually goes the Ravens offense.