LSU had one of the most explosive offenses in the country last season, but the Tigers will look a lot different this year. Losing their offensive coordinator, their Heisman Trophy-winning quarterback, and two first-round draft picks at wide receiver. Quarterback Garrett Nussmeier now takes over the reins of the offense, and the more help he can get from the run game and his backfield, the easier his job will be in his first full season as a starter. At the Manning Passing Academy, Nussmeier spoke about his running backs and what he expects out of that unit this upcoming season. “Yeah, I think …