Robinson has not played in two years. He was suspended by LSU in 2014 and was then arrested for stealing items from his teammates. He also battled academic issues.
When he did play, the 6-foot-1 Robinson showed promise. He played in 15 games in 2013 and 2014. He even shut down Mike Evans during one. He'll likely be a Day 3 pick.
Robinson makes perfect sense as a pre-draft visit. He has talent, but teams will want to get a feel for him before they draft. Talent can only take a player so far if they're going to have issues off-the-field.