09/04/2001 11:00PM

Columbus

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COLUMBUS, Neb. - The small size of the jockey colony was evident Monday afternoon when only nine riders were in the room for the nine-race card. Six horses scratched for lack of a rider.

Leading rider Jerry Carkeek won four races on both Saturday evening and Monday afternoon. He owns a 42-25 advantage over Armando Martinez in the standings. Also on Monday, newcomer Alex Granda had three wins and Dennis Baxter two. Carkeek, Granda, and Baxter accounted for all the races Monday.

Dan Coughlin had four wins over the weekend. He trails Marv Johnson in the trainers' standings, 12-9, with two weekends remaining in the meet. Johnson has shipped a large part of his stable to Hoosier Park, which opens Friday.

Coughlin collected two of his wins Monday when Xylocoe captured the 1 3/8-mile Coors Starter Series finale in the seventh race. He then saddled Mr Zooha to victory in the Labor Day Handicap in the following race.