TCU quarterback Casey Pachall will undergo an MRI Wednesday on his sore shoulder, an injury that has forced him to miss the past three days of practice. Coach Gary Patterson told the Fort Worth Star-Telegram following a scrimmage Wednesday morning that he does not expect anything too serious when the results come back. "We don't think it's a big deal," Patterson told the newspaper. "I don't expect to see anything." Read more: http://espn.go.com/dallas/ncf/story/_/id/6870085/tcu-horned-frogs-qb-casey-pachall-mri-sore-shoulder