Both Hamlin and Logano had issues the rest of the race but after it was over, Logano attempted to stick his head into Hamlin's car to talk to him but was yanked away by one of Hamlin's crew members. The two teams traded shoves before the group was dispersed.
"That's a freaking genius behind the wheel of the No. 11 car - probably the worst teammate I ever had, so I learned that now," said Logano. "He decided to run in the back of me, so, whatever. I have a scorecard and I'm not putting up with that."
Hamlin dismissed Logano's complaints.
"You really got to control your car and he slipped up into me," Hamlin said. "Really, he would have been in the garage with no radiator in it if I had not checked up twice ... I didn't mean to spin him out but his day was fine. He still had a bad day anyway for whatever reason and we finished bad, too. It's even."
Keselowski leads Dale Earnhardt Jr. by nine points after four races. Jimmie Johnson, who was the points leader, dropped to third after his 22nd place finish on Sunday.
"We're off to my best start ever and that's really cool," Keselowski said. "I think we know as a team what we need (to continue). We've got a pretty good handle on it."
5 key moments
1 . Joe Gibbs Racing established its dominance early as teammates Kyle Busch and Denny Hamlin led a combined 173 of the first 237 laps.
2 . Denny Hamlin wrecked Joey Logano as the two were battling for second place on Lap 348 and neither ended up a factor in the race outcome.
3. Jeff Gordon and Matt Kenseth, running first and second, wrecked out of the race on Lap 390 when Gordon blew a right-front tire. Kasey Kahne, then running third, inherited the lead.
4. In an entertaining duel on the track, Brad Keselowski finally overtook Kahne for the lead on Lap 448 but the field was bunched again by a caution on Lap 456.
5. On a restart on Lap 461, Kahne darts ahead of Keselowski to take the lead and remains out front the final 40 laps.
Auto Club 400
Where: Auto Club Speedway, Fontana, Calif.
When: 3 p.m. Sunday
Radio: Motor Racing Network
Last year's winner: Tony Stewart