Allister with his father Dr Fred McSorley
Allister McSorley, a paramedic, was airlifted to hospital after a collision in Co Antrim just before the Armoy Road Races.
The race meeting was later stopped due to bad weather.
Mr McSorley is a regular motorbike medic while is father used to be a travelling doctor at race events before he retired last year.
It is understood Mr McSorley was taken to Belfast’s Royal Victoria Hospital where his condition is unknown.
The death in 2015 of Dr McSorley’s colleague John Hinds, an anaesthetist at Craigavon Hospital, prompted a major push for an air ambulance.
Dr Hinds was killed in an incident at the Skerries 100