I assume you pulled this from TP's site but I am wondering where they got it. Not that it matters as we are going after bigger backs. I was just bored this morning. At the Massillon NFSC this year they list differently (
Massillon NFSC Results (H.S.):
Actually, I'm the one who wrote that article.
The SPARQ information was sourced directly from the guys at Student Sports. He has gone through SPARQ testing multiple times, and you can find multiple of his results on SPARQ leaderboard here:
2014 SPARQ Rating National Leaderboard
The 5'8.5" was what I was told when I asked... however, looking at the leaderboard and researching it further it seems he measured in at 5'9" (or 5'10"? shoes on?) at most recent events. The Chicago one was "verified" testing AFAIK, where he's listed at 5'9". So I'm not sure where they got the 5'8.5" from that I was told.
Here's the Chicago results with his best 40 time and SPARQ:
Chicago NFTC l Official Testing Results