Jockey Kathy O'Hara has a suspected broken wrist after a fall at Gosford.

O'Hara's injury comes a day after Peter Robl escaped relatively unscathed after he came off a buck jumping horse at Scone.

Robl feared the worst when he couldn't feel his legs immediately after the incident but subsequent scans cleared him of spinal damage.

Just hours before her fall at Gosford, O'Hara was named as Robl's replacement on Victorian colt Armageddon On It in Saturday's $250,000 Inglis Classic at Randwick.

O'Hara spent a couple of weeks out of the saddle after she fell in a race at Randwick in late November and was clipped in the head by a following horse.

She suffered a deep gash and concussion but stunned doctors with the speed of her recovery.