|Following an impressive 2011 season with Southern California, Barkley decided to return for his senior year and was expected to be a contender for the Heisman Trophy. Instead, those expectations were dashed and he suffered a shoulder separation that prematurely ended his collegiate career. Barkley has the potential to be selected in the first round but will likely fall to the second due to his size, lack of arm strength, limited mobility and durability issues. Scouts, though, are impressed with his success in a professional-style offense at USC. He led the nation with 75 touchdown passes over the past two seasons, and his 36 last year topped the Pac-12. In 11 games, he completed 63.6 percent of his passes for 3,273 yards with a career-high 15 interceptions - nine in his final four contests. That has added questions about his decision-making in the pocket, and some teams feel Barkley would likely benefit learning as a backup. He's effective in the short-passing game and can hit mid-range targets, but he struggles when trying to stretch the field vertically. That's become more of a worry due to his shoulder injury, which prevented him from throwing at the combine. He's injured his shoulder previously and underwent wrist surgery in 2010. His injury history, however, has been overshadowed by his intelligence and leadership qualities, traits that have impressed scouts. Having the mental capabilities to run and lead an NFL offense may be enough for a team to take a chance on him in the opening round, but there could be too many questions about his physical abilities.