By Bill Bradley, contributing editor
The "ice bucket challenge" quickly has become a trend throughout the sports world.
The challenge, which has evolved as a way to show support for those suffering from Amyotrophic lateral sclerosis (ALS), involves taking a large bucket of ice water and dumping it over your head.
The latest person to take the challenge is NFL Commissioner Roger Goodell. He dunked himself with a barrel full of ice water and then -- as is the custom -- passed on the challenge to someone else. In this case, he called out Seattle Seahawks coach Pete Carroll and Pro Football Hall of Fame lineman Michael Strahan.