Dive summary:

• Tom Brady, Derek Jeter and Michael Jordan are the three sports personalities that fans would most like to see start using Twitter, according to an ESPN survey.
• Retired college basketball coach Bobby Knight, 72, is by far the oldest person on the list of top 15 sports personalities that fans want to see start using Twitter, and the second oldest is 50-year-old NFL coach Rex Ryan.
• Tennis champion Maria Sharapova is on the list at No. 11, but her agent says she will start using Twitter in January.

From the article:

… Despite all those who extoll the virtues of the power of social media, Carlos Fleming, the marketing agent of Carolina Panthers quarterback Cam Newton, says "the downside of Twitter outweighs the upside."

Fleming says Twitter means the athlete chooses to "always be on the microphone," and one mistake could overshadow years of good. …