Four months ago, actor/comedian Will Ferrell made history when he played 10 positions for 10 different Major League Baseball teams in the same day to help raise money for fighting cancer. HBO just released their first teaser trailer for "Ferrell Takes the Field," a documentary that chronicled his crazy day around five MLB Cactus League Spring Training games. It will debut on HBO Saturday night, Sept. 12. Judging from the 90-second clip, people will enjoy watching the 47-year old Ferrell act out every baseball fan's fantasy.