Electric burst, but the health ledger matters
In the 2012 season, Keith Marshall flashed elite big-play juice for Georgia, rushing for 759 yards and 8 touchdowns while averaging 6.5 yards per carry; his calling card was rare speed, including a reported 4.31-second 40 at the 2016 Combine. The upside is obvious: home-run acceleration, explosiveness in space, and enough receiving ability to stay on the field. The caution flag is just as real, though—his Georgia career was repeatedly interrupted by knee injuries, so any team got a high-ceiling playmaker with a durability question that could change the fit.