He capped his sophomore year in January with a sensational performance against USC in the Rose Bowl. He gained 306 all-purpose yards and scored three touchdowns, including a dazzling 79-yard touchdown run.
Yet less than 24 hours later, Barkley was restless on Penn State's flight from California to Pennsylvania. He kept thinking about what he else he could have done to help the Lions avoid a 52-49 loss to the Trojans in one of the most thrilling Rose Bowls ever.
"He came up to me midway through the flight," Huff said. "I was sleeping, and he tapped me on the shoulder. 'What do I need to get better?' What do I need to do this offseason?'"
That's the essence of Barkley, who wasn't satisfied after leading the Lions to an 11-3 record and a final No. 7 national ranking, their highest in 11 years.
He worked on route running with Penn State receivers, even though he caught 28 passes for 402 yards and four touchdowns, including ones in the Big Ten title game and the Rose Bowl.
"I feel that, and Coach (James) Franklin will agree, that I'm capable of being lined up in the slot," Barkley said. "I did a lot of one-on-one reps this summer against our DBs and linebackers. I worked out with 'Hammy' (wide receiver DaeSean Hamilton), trying to really fix my routes to become more of a threat in the offense."
He spent countless hours in Holuba Hall and in the weight room in the winter to improve his speed and strength. He lowered his team-best time of 4.38 seconds in the 40-yard dash to 4.33, which would have been the fastest for a running back this year at the NFL combine. He increased his lift in the power clean from 380 pounds to 405, the best on the team.
His teammates regard the 5-11, 230-pound Barkley as an athletic freak and tireless worker.