Kyle Larson and Chase Elliott each will go to a backup car for the Gander RV 400 at Pocono Raceway after crashing in the opening practice.
Larson was the first to go to a backup when he hit the outside wall with his No. 42 Chevrolet coming out of Turn 2 before making heavy impact with the inside retaining wall early in the practice.
This will mark the second consecutive week that Larson will have to race a backup car.
"I’m just disappointed in myself," Larson said. "That’s two weeks in a row now. I hate that I did that. I just got really loose, over-corrected some, spun to the inside and hit the wall. I just hate that I did that."
Larson was 12th fastest at the time of impact and only completed two laps.
"We only have today for practice and I didn’t have much time in that practice session," Larson said. "Hopefully we can get some laps in the backup car. I was happy last week with the efforts to get the backup ready and the outcome in the race as well."
Elliott made contact with the wall coming out of Turn 1 and it damaged the right-rear of his No. 9 Chevrolet.
"I just made a mistake and crashed," Elliott said. "I put myself in a pretty poor situation there in practice. I apologize to my guys here and the people back at the shop. It was just stupid. That’s what you get when you make those mistakes."