Ten Most Memorable Tweets of 2012

From actor-turned-sportswriter Rob Lowe breaking news on Peyton Manning's career plans to Mike Tyson revisiting his famed bit on Evander Holyfield's ear to A's pitcher Brandon McCarthy making a post-surgery proposition to wife, Amanda (and her great response), it's already been a memorable year for sports tweets. Here are SI.com's picks for the top 10 tweets of the year (so far).