There are three allowances on a 10-race Sunday card at Fair Grounds, but as far as Kentucky Derby watchers are concerned, only one that matters.
A chestnut colt named Machen will make the second start of his career in the fifth race, and after earning an eye-popping 95 Beyer Speed Figure in a romping victory in his Jan. 2 debut at the New Orleans track, a similar performance on the stretchout Sunday surely would bump him up a few rungs on everyone’s list of 2011 Derby prospects.

