Local rider Tim Venables, who was badly injured in an accident during Wednesday's Junior MGP, is said to be "serious but stable" at a Liverpool hospital.
Venables won the newcomer's race on Monday but came off his machine at Greeba Castle in a race which was red flagged after an incident at Alpine in which two riders were killed.
Meanwhile, Ollie Linsdell, who came off at Bishopscourt during the first race of the meeting on Monday, is making progress and is said to be stable and improving.
John Thompson, who came off at the Creg during yesterday's Senior MGP and was detained in Noble's for observation, has now been discharged. Peter Gibson, who crashed at the Graham memorial during the same event, is in theatre today for treatment to a fractured arm.