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Round 1 Open Championship grades

GULLANE, Scotland -- Time for me to put on my teacher's hat, grab my ruler and give out some grades and maybe even a few slaps on the wrists.

Every major I'll grade the top five in the OWGR (Official World Golf Ranking) and throw in a couple of random ones just to keep you on your toes. How did the top five grade out for the first round of the Open Championship? Check it out ...