Martin Truex Jr. was fastest in the first Cup Series practice session for the Go Bowling 400 at Kansas Speedway.
The No. 78 Toyota posted the top speed of 185.065 mph around the 1.5-mile track.
Dale Earnhardt Jr. was sixth fastest and he had the best 10-lap average at 182.216 mph. Only three drivers made 10 consecutive laps in the session.
The session was slowed twice. Jones brought out the red flag when he spun with about 15 minutes left in the session. His No. 77 Toyota spun exiting Turn 4 and slid through the infield grass. Jones will not go to a backup car.
“Well I was just a little bit free and I moved up a little bit in (Turns) 3 and 4 to try to keep the lap time in it and it started getting away from me some and eventually just had to kind of give up on it,” Jones said. “It’s already getting too free and there was kind of no coming back. So just gave up, spun out. Luckily, we didn’t really catch the grass too bad and didn’t get too much damage.”
The final three minutes of the session were under a red flag after Michael McDowell blew an engine in Turns 1 and 2.