With his race win and two stage victories in Sunday’s Auto Club 400, Martin Truex Jr. assumed the Cup points lead for the first time in 2018.
The defending series champion took the lead from Kevin Harvick, who finished nine laps down after a Stage 1 accident.
Truex has a nine-point lead over Kyle Busch.
Completing the top five is Joey Logano (-19), Brad Keselowski (-33) and Ryan Blaney (-35).
Harvick fell to eighth in the standings.