For some reason he reminds me of Percy Harvin. I'm not saying he IS Harvin but he certainly has impressive physical credentials. Harvin was primarily a receiver but did successfully execute a number of plays out of the backfield. McKinnon's experience is primarily backfield (QB/RB) and although he is not a receiver has expressed confidence in his ability to do so. Compare their combine stats:
PH: ht 71" / vert jump 37.5"; hands 9 3/8" / arm length 31 5/8"; 40 yd 4.41, BP (225lbs) 19 reps.
JM: ht 69" / vert jump 40.5"; hands 8 5/8" / arm length 30 1/4"; 40 yd 4.35, BP (225lbs) 32 reps!
My point is the unheralded Mckinnon could become a potent "stealth" weapon in the overall offense and would seem to have great potential as a punt/kickoff returner. Especially in the suddenly potent, offensive coaching environment I think he could blossom into a talent that was largely unexploited in Georgia. The Viking coaching staff has envisaged Darren Sproles as a point of comparison. That is well and good. But Harvin was here and gives me a bit more to hang my hat on comparatively.