The average field size for a race held in May at U.S. racetracks jumped 21.4 percent this year as horsemen flooded races at tracks that were able to hold live races in the midst of the COVID-19 pandemic, according to figures released by Equibase on Thursday.
Average field size during the month was 8.64 horses per race, compared to 7.11 horses per race in May of last year, Equibase said. U.S. racetracks held only 1,059 races in May, compared to 3,650 races in May of last year.