DEL MAR, Calif. – Apprentice jockey Eswan Flores has been prohibited from riding since Aug. 25 by the California Horse Racing Board because the initial sample from a random drug test came back positive for cocaine, multiple sources close to the situation have confirmed. The status of the split sample from the test, which was administered at the track Aug. 23, was not clear as of Monday. Both the Del Mar stewards and officials of the California Horse Racing Board have declined to comment on the situation. By rule, they are not allowed to comment on the results of a drug test “unless or until the Board files an official complaint or accusation.” If the split sample confirms the original test result, the CHRB could file a complaint against Flores. As of Monday, no complaint had been filed and no specific reason given for the absence of Flores. Flores maintains a Twitter account, but has posted sparingly since Aug. 25. On Aug. 26, a note was posted on his account that said, “Eswan is taking time off to handle a private issue. He is fine and will update early this week. Doug for Eswan.” A full week went by until the next post, which went up on Sunday. It said, “Hey Everyone. We should know something on Tuesday. Thanks for the kind words and support.” As of Monday, there had been no additional posts. Joe Griffin, Flores’s agent, on Monday said he believed he wouldn’t “have any real answers until [Tuesday] or Wednesday.” The Del Mar meeting closes on Wednesday and entries for opening day of Fairplex, which begins Friday, were to be taken Tuesday. But Griffin said he did not know what Flores’s status would be then. Flores, 19, rode at Fairplex last year when just starting his career. His apprentice allowance was scheduled to expire on Sept. 11. Griffin said he had been in contact with Flores, who Griffin said went to Los Angeles over the weekend after remaining in the Del Mar area for the past week. Flores grew up in the Los Angeles area. Flores had won with just 8 of 105 mounts at Del Mar. This year, he has won with 83 of 675 mounts, and his runners have earned $2,922,187. For his career, Flores has 109 wins from 977 mounts and purse earnings of $3,644,987.