07/28/2007 11:00PM

In Summation upsets Bing Crosby

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DEL MAR, Calif. -- In Summation, whose career began with promise in Florida two years ago but had been in a funk for most of the past 18 months, broke through with the biggest victory of his career on Sunday when he just held off Greg’s Gold to win the Grade 1, $300,000 Bing Crosby Handicap for older sprinters at Del Mar.

In Summation ($18.40) lasted to win by a nose in 1:11.06 for six furlongs on Polytrack. Reflecting the slow times on the new surface, that was the fastest six furlongs of the 11-day-old meeting.

Bordonaro, who set the early pace, tired late to finish third, 1 1/2 lengths behind Greg’s Gold, the 2005 Crosby winner. Among the other prominent runners, Declan’s Moon was sixth and the previously unbeaten E Z Warrior, who went off as the lukewarm 7-2 favorite, was eighth in the field of nine.

It was the first start on Polytrack for In Summation, who had raced exclusively on turf since being transferred to trainer Christophe Clement last fall. Corey Nakatani, who often rides for Clement, picked up the mount.

In Summation, 4, is owned by the Waterford Stable of Tom and Judy Moore. Based at Calder at age 2, In Summation won his first five races. But he suffered through a 10-race losing streak before capturing a turf sprint stakes at Monmouth Park on June 23.

Jockey Michael Baze, who was thrown from an injured horse in the day’s first race, missed the middle of the card but returned in time to ride Battle Won to a fourth-place finish in the Crosby after X-rays on his left leg were negative.