Richard Childress Racing’s Brandon Jones was fastest in the first Xfinity Series practice session at Chicagoland Speedway.
Jones and his No. 33 Chevrolet posted a top speed of 174.413 mph around the 1.5-mile track.
Darrell Wallace Jr., making his first Xfinity start since June, was 20th in the No. 98 Ford at 169.609 mph.
Tifft recorded the most laps in the session with 30.
Five drivers made runs 10 laps or longer. Jones had the best 10-lap average at 169.276 mph. Gaughan followed him at 168.564 mph.