BROOKLYN, Mich. - Greg Biffle led both Saturday practice sessions at Michigan Int'l Speedway on Saturday while Dale Earnhardt Jr. crashed and will start a back-up car in Sunday's Pure Michigan 400.
Biffle was the fastest of the morning session and followed that effort with a lap of 198.879 mph to lead the final practice of the weekend.
Jimmie Johnson, who changed an engine earlier in the day and will start at the rear of Sunday's field, was second quick.
Joey Logano, Matt Kenseth and pole sitter Mark Martin rounded out the top five.
Kasey Kahne, Tony Stewart, Carl Edwards, Denny Hamlin and
Earnhardt Jr., who is looking to sweep both Michigan races this season, crashed with only five minutes left in the session. He will be forced to run his back-up machine and will also need to drop to the back of the field on Sunday.
"We tested it here when we first came, so we know a lot about the car here at this particular track, where in most cases you don't," Earnhardt said of his back-up. "We have that going for us. We have a lot of information, and I feel like we should be able to put a car out there that's relatively in the ballpark. ... Other than just starting at the back, I don't think it's hurt our chances too much. I mean, you hate to wreck the primary car, but the consequences and the situation really couldn't be more favorable with the backup than it is here for us."