this was a Rant myth started by Roaad and a few other Rantards.
Please see the link. The 1st half is all run, second half passing. Though he doesn't have a great spiral, I think the video show his ability to throw is not a myth. Also note most of his runs are up the middle. He's a downhill runner. You rarely see him run a sweep.
We need to give a ball a few more times as a RB the last few games. He's earned it, IMO, and has been a great ambassador of LSU football.
And let him throw it just once!