Houston Texans defensive lineman J. J. Watt is one of the biggest players in the National Football League (NFL). But he wasn't always on track for stardom. J. J. started his college career playing tight end at Central Michigan University. A career in the pros seemed out of reach. But after a transfer to the University of Wisconsin and a switch to the defensive line, J. J.'s hard-hitting talents began to shine. In 2012, J. J. led the NFL in sacks and cemented himself as one of the league's most-feared players. Learn how J. J. beat the odds and rose to fame.