ROSS Geraghty became the 40th jockey to win 100 American jump races, securing the Grade 1 New York Turf Writers Cup aboard Optimus Prime at Saratoga on Thursday.

Riding the six-year-old French-bred in his American debut, Geraghty engineered a waiting game to outkick Irish-bred New Member, scoring by a length and a quarter. Irish raiders Clarcam (Lisa O’Neill) and The Game Changer (Kieran Norris) finished second-to-last and last in the eight-horse field.