As hard as NFL draft prospects work out for the , training for drills is, in one sense, the easy part. At least the demands are known ahead of time -- the 40-yard dash, the vertical jump, etc. -- and players arrive knowing exactly what will be asked of them on the field.The hard part? Interviews, where preparation meets utter unpredictability."One team asked Tim Tebow Jersey me who the fourth President of the United States was," said Clemson defensive end , who is chronicling his draft experiences through . Sure, there is homework that can be done on football questions, but Jay Bruce Jersey no amount of preparation would include , who served two presidential terms roughly 200 years ago.Lawson, like most anyone who isn't an American history scholar would, stumbled."I didn't know the answer," he said.No problem, Shaq. We had to look it up, too.Where Lawson didn't stumble was the 40-yard dash, where he turned in of the event with a 4.70 at 270 pounds. His agility tested exceptionally well also, as his 4.21 time in the Michael Conforto Jersey 20-yard shuttle was among defensive linemen, matching presumptive top-10 pick of Ohio State. In fact, he performed well enough acro s the board that he expects to participate only in position drills and Todd Frazier Jersey the 60-yard shuttle at . Lawson said he'll return to Indianapolis on April 15 for a medical re-check on an old shoulder injury he suffered his freshman year.Lawson met with 22 clubs at the combine for formal interviews that last 15 minutes each. Among them: the , , , , , , , , , and .He spent some extra time informally with the , and the were the first club to schedule him for a visit to the team's facilities.There, the interviews will continue.But with the combine lightning rounds out of the way, Lawson can only hope to be finished Travis D'Arnaud Jersey with the presidential history trivia.Follow Chase Goodbread on Twitter .