J.J. Watt is the epitome of the transformation for star defensive linemen.
Houston Texans defensive end, Watt, is a 6'5", 295-pound monster that is coming off another Defensive Player of the Year award, and in his spare time, he's evidently pretty good on the ice, too.
Watt started skating when he was 3 years old, and gave up the sport to pursue football when he was 13 years old, according to his interview with NHL.com.