The reason why Ohio State WR Parris Cambell didn't run a sub 4.3 40 unofficially is his upper back was tight on that 1st 40...called it out the gate. Again good form is important, but these trainers have to focus on teaching guys how to run more relaxed AND fast. 4.32u.

— JosinaAnderson (@JosinaAnderson) March 2, 2019