AMBIGUOUS (1) has filled a minor placing at both runs this time in work, working home in good style at the most recent outing to finish second over 1710m at this track (Dirt). Fitter and should be in the finish. BISHOP CREEK (4) is putting together some solid results. Finished third at Sam Houston Park (Dirt) two starts back then scored by 4 lengths last time out over 1408m at this track (Dirt). F Wethey Jr scored on him last time and retains the mount. Finds a suitable race and can figure in the finish. NAT GAS (5) has been freshened up since he finished eighth over 1207m at Oaklawn Park (Dirt) five-and-a-half weeks ago. Settles back early but winds up late. Will prove tough to stop. MYSTIFICATION (3) returns from a spell of 11 months and did score first-up when last in work at this track (Dirt) over 1308m. Lines up for the first time for the Martin Valdez-Cabral (Jnr) stable.