Justin Wilson suffered a fractured pelvis in a multi-car accident during Saturday's MAVTV 500 IndyCar season finale at Fontana.
The Briton lost control on a seam in the track on lap 110, launching his car into a spin where it was T-boned by Tristan Vautier, who had no opportunity to avoid him. Josef Newgarden also collided heavily with Oriol Servia in avoiding Wilson, and James Jakes was also caught up in the incident, although Wilson was the only driver to sustain any injuries.
He was extracted from his car by the medical team and taken to a nearby hospital, where his brother Stefan confirmed in a Tweet that he was alert and awake, but had suffered a "small facture to his pelvis." IndyCar subsequently released a statement from its medical director, Dr. Michael Olinger, confirming: "Justin Wilson has non-operable pelvic fractures and a small pulmonary contusion. He will be kept overnight at Arrowhead Regional Medical Center for further observation."
Stefan Wilson also indicated that initial scans had not detected any injuries to Justin's back – the Dale Coyne Racing driver suffered fractured vertebra at Mid-Ohio in 2011 – but added that an additional MRI scan is scheduled.
According to the younger Wilson's tweet, the impact was recorded at 62 lateral Gs.