In Saturday's first race of the weekend's NASCAR Cup Series doubleheader at Pocono Raceway, Denny Hamlin's shot at victory came apart when his car developed a vibration in the late going. On Sunday, Hamlin went vibration free and the result was a victory in the nightcap.

Despite weather delays forcing the Pocono 350 to conclude with the sun sunk below the Pennsylvania horizon at the light-less 2.5-mile triangle track in Long Pond, Hamlin became the winningest active driver at Pocono and tied Jeff Gordon for the most all-time Cup wins at the track with six.

The victory was also the series-leading fourth of the year for the Joe Gibbs Racing driver.

In Saturday's race, Stewart-Haas Racing's Kevin Harvick held Hamlin off to get the win. On Sunday, the situation was reversed as it was Harvick who just could not track down Hamlin over the final laps and had to settle for second place.

The margin of victory was just over 3 seconds.

Finishing third was Erik Jones, Hamlin's teammate, followed by Chase Elliott of Hendrick Motorsports Aric Almirola, Harvick's teammate.

Kyle Busch's disappointing season continued when, on Lap 76, the defending series champion who has gone winless so far this season tangled with Ryan Blaney. Busch spun and slammed the infield wall, ending his race.

"We're in 2020 so it doesn't surprise me to get crashed out," Busch said on the Fox broadcast. "I don't know what happened but it doesn't make any sense to talk about it."

Once again, bad weather forced a delay in the action. Lightning strikes near the track during the pace laps forced the race to start about 40-minutes later than scheduled. The cars went back on the track but after four laps, rain started. That led to a 50-minute red flag stoppage.

At about 6 p.m. Eastern, the cars headed back onto the track under yellow. At 6:15, the green flag restarted the race.