For more than 200 days, Spanish golfer Sergio Garcia was the subject of a relentless Twitter campaign from one of his big fans. Mark Johnson, a 40-year-old Englishman, just wanted one thing: To be Garcia's caddie for a day. Using the hashtag ''Letmecaddieforyou'' on each occasion, Johnson sent Garcia a daily tweet - some funny, some informative, some desperate - from July 9 but got no response the first 205 times. More...