Conor Daly will replace James Hinchcliffe for this weekend's doubleheader in Detroit.
Daly will drive the No. 5 for Schmidt Peterson Motorsports at Belle Isle Raceway on Saturday and Sunday. Hinchcliffe has been hospitalized since suffering a life-threatening leg injury during a crash practicing for the Indianapolis 500 on May 18.
Hinchcliffe's recovery period is undetermined, and the team said Monday it will use a replacement driver until he returns.
Daly drove for Schmidt Peterson in the Indianapolis 500, but a mechanical issue caused his car to catch fire before the green flag and he didn't make a single lap.
He was also a last-minute replacement driver at Long Beach for Dale Coyne Racing and finished 17th.