Malcolm Stewart sustained a broken femur in Saturday night’s crash in Round 2 of the Supercross season in Glendale, Ariz. according to reports at RacerXOnline.com.
Stewart was running fourth at the time of his accident when he lost control in the whoops and went down hard at the end of the section.
He was attended to by the Mobile Medical Crew and waved to the crowd as he was carted off the track.
He is scheduled to undergo surgery on Sunday.
Scott McLaughlin led the final six laps Saturday and finished 0.4241 seconds ahead of teammate Will Power to win the Honda IndyCar Grand Prix of Alabama at Barber Motorsports Park.
Scott Speed finished third behind the Team Penske drivers. Alex Palou and Simon Pagenaud rounded out the top five.
Click here for the full boxscore from Saturday’s IndyCar iRacing event at Barber Motorsports Park.
WINNER: Scott McLaughlin holds off teammate Will Power
WHAT DRIVERS SAID: Postrace reactions on social media
Other notable finishers:
Colton Herta (seventh), Robert Wickens (eighth), Jimmie Johnson (12th), Graham Rahal (14th), Alexander Rossi (22nd).
Sage Karam led a race-high 24 laps but retired from the 45-lap event because of a crash and finished 27th of 29 drivers.