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Jackson (6-foot-1, 220) ran the 40-yard dash in 4.35 and 4.38 seconds at the Michigan pro day Friday, NFL.com reports. Jackson added a 41-inch vertical, 133-inch broad jump, 4.27-second 20-yard shuttle and 6.82-second three-cone drill.
Jackson was mostly an afterthought in this draft after playing at lowly Eastern Michigan, but he almost has to get drafted after a workout like this. The 41-inch vertical would tie for eighth-best among running backs at the Combine since 2006, while the 133-inch broad jump would tie for fifth-best over that span. To post those jumps and a sub-4.4 40 at 220 pounds is quite impressive. Jackson didn't do much for his first two years at Eastern Michigan, but he enjoyed an impressive breakout season in 2015, running for 1,078 yards and 14 touchdowns on 208 carries (5.2 YPC) while showing pass-catching ability by snagging 21 passes for 201 yards and two more scores.
