Kobe Bryant announced his retirement at the end of the NBA season through the web and social media -- not by press conference. Sure, Twitter retirement announcements aren't a new thing: Shaq did so in 2011, not to mention David Ortiz and Steve Nash. It wasn't a completely Twitter-specific announcement. He linked to his farewell message / poem in full on The Players' Tribune (a site launched by fellow former-athlete Derek Jeter). The site, which allows pro athletes to self-publish (and say what they want to), meant Bryant gets to say his piece -- although it's not specific. That said, it's already been retweeted over 70,000 times, and half an hour later, the NBA followed up itself on Twitter. The response was so strong that Jeter's site crashed under the strain. It's back online now, so if you'd like to see a portrait of Bryant whispering his farewell sonnet into a basketball, here's where to go.