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Big Brown, unbeaten in three starts, has been tabbed the early favorite for the Kentucky Derby to be run this weekend in Louisville, Kentucky.

Big Brown will go from the far outside number 20 post position, the last position in the Derby field. Colonel John is at 4-1 and will break from the number 10 post; Pryo is at 6-1 and will break from the number nine post.

In all, 20 horses are set for the Kentucky Derby field. After the three favorites, all the other horses in the field have odds of 15-1 or more.