Wilson, 33, fractured the T12 bone in his spine after hitting the SAFER barrier at Turn 1 head-on, following a clash with Katherine Legge in Monday’s practice session.
The injury has ruled him out of this Sunday’s 107th running of the Indianapolis 500 and he will be replaced in his Cusick Motorsports entry, which is run by Dreyer & Reinbold, by Graham Rahal – who used to be a team-mate to Stefan's late brother, Justin.
