Murtagh odds-on for Ballydoyle job Speculation surrounding the future of Jamie Spencer as stable jockey at Ballydoyle has led bookmakers to price up a market on the next stable jockey in Aidan O´Brien´s yard.John Murtagh is the odds-on favourite with both Cashmans and Paddy Power, the Cork-based firm going 4/5 while Powers offer 4/6. Kieren Fallon is next in line at 2/1 (Cashmans) and 3/1 (Powers), while Darryll Holland is 3/1 with both firms. Cashmans go 14/1 Bar.Attheraces reported that Spencer has resigned from his position as stable jockey at Ballydoyle but there is no official comment from either the rider or his employers.