Twitter quickly became one of the world's most popular social media sites after its launch in 2006. Anyone can publish their thoughts using tweets of up to 140 characters. Athletes, coaches and sportswriters use Twitter to break news and interact with the fans. Sports Illustrated's Peter King and Green Bay Press-Gazette's Rob Demovsky said their publications directed them to use Twitter as part of their daily reporting. Players speak their mind on Twitter, but they must be careful because the messages are visible to millions of people. Some NFL figures tweeted their criticism of Jay Cutler...