US PGA

Teen star Ryo Ishikawa of Japan tees off during the Pro-Am event prior to the start of the Northern Trust Open at the Riviera Country Club in Los Angeles on February 16, 2011. Ishikawa has booked his trip to the 2011 Masters from the final 2010 world rankings. The annual tee off to the men's major championship season at Augusta National Golf Club invites players who are among the top 50 in the world rankings at the end of the previous year. ... more 

Teen star Ryo Ishikawa of Japan tees off during the Pro-Am event prior to the start of the Northern Trust Open at the Riviera Country Club in Los Angeles on February 16, 2011. Ishikawa has booked his trip to the 2011 Masters from the final 2010 world rankings. The annual tee off to the men's major championship season at Augusta National Golf Club invites players who are among the top 50 in the world rankings at the end of the previous year. Newcomers have boosted the field for next April's event at Augusta National Golf Club to 92 players, with qualifying still possible by winning certain US PGA Tour events or reaching the top 50 in the week before the tournament. AFP PHOTO/Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images) less