Legacy Motor Club ruled Noah Gragson out at Sonoma and named Grant Enfinger to drive their No. 42 NASCAR Cup Series Chevrolet.
Gragson hit the wall in turn one on lap 197 with the rear of his car. Medics treated and released him from the infield care center.
Then, the team said, Gragson began experiencing concussion-like symptoms midway through the week. He is now seeking treatment.
Halfway through the Gen 7’s second season, Gragson is the third driver sidelined by concussion-like symptoms experienced after a crash.
Alex Bowman missed five playoff races after a crash last September at Texas. Meanwhile, Kurt Busch remains sidelined after a crash last July at Pocono.
In the wake of those crashes, NASCAR took steps to ensure the Gen 7 car absorbs energy away from the driver during a crash.
Enfinger will replace Gragson at Sonoma and get to make his first Cup Series start. He failed to qualify the 2011 Ford EcoBoost 400 – his only Cup Series attempt to date – but will be locked into the field Sunday.
Enfinger has nine wins, 54 top-5 finishes, 96 top-10s and five poles in 162 career Truck Series starts. In six full-time seasons, he has four playoff appearances, including a Championship Four appearance in 2020.
Currently, he sits fourth in the Truck Series points with two wins, five top-5 finishes and seven top-10s after 12 races so far.