http://www.usatoday.com/story/sport...fensive-end-bill-mccartney-grandson/31059305/ At Colorado, that star has continued to soar. Derek is pre-med, majoring in Integrative Physiology. By the end of this past spring semester, he'd already surpassed 100 credits. He plans to graduate next spring and then enroll in a graduate program. Derek isn't sure what area of medicine he wants to study down the line, but he does think he'd like surgery. He's also found studying the heart intriguing, because of Kaylee's condition. Derek balances his studies with his commitment to improving as a football player. Last season, after a redshirt year, the 6-3, 240-pound defensive end started every game, accumulating 34 tackles (23 solo, including six for losses and four for zero gains) and four and a half sacks, which tied for the second-most sacks by a freshman (true or redshirt) in school history.