CHICAGO - With only nine days of racing remaining at Arlington as of Thursday, the trainers' race still is very much up for grabs. Jerry Hollendorfer, the perennially dominant northern California trainer who spent his first summer in Chicago this year, has led virtually from the meet's inception in mid-June. But after opening a seven-winner lead less than two weeks ago, Hollendorfer's edge was trimmed to two on Sunday by Wayne Catalano, the defending champion, who has been in pursuit all summer. Through Sunday's races, Hollendorfer had won 34 of 194 starts, Catalano 32 of 113.