A Black trainer saddles a horse in the Kentucky Derby for the second time since 1951

LOUISVILLE, Ky. — If Larry Demeritte is looking for a positive sign heading into his first Kentucky Derby as a trainer, it’s right where his horse is assigned.Long-shot West Saratoga is staying in Barn 42 at Churchill Downs, the same location where Seattle Slew was before he won the 1977 Derby and went on to sweep the Triple Crown. It was the first Derby that Demeritte attended.Now, he is the second Black trainer since 1951 to be saddling a horse in the big race, which has its 150th running on Saturday. The other, Hank Allen, finished sixth with Northern Wolf in 1989.Black trainers…