By STEVE REED
AP Sports Writer
BRISTOL, Tenn. (AP) - The Cup Series race at Bristol Motor Speedway has begun amid a forecast that includes a heavy dose of rain.
The race started about 30 minutes later than planned as NASCAR worked to dry the half-mile track after morning rain.
However, it remains unclear if the rain will hold off long enough to get the race in. The forecast calls for a 100 percent chance of rain Sunday.
There will be a competition caution after 45 laps to reassess the track.
Drivers must complete 250 of the 500 laps for the race to be considered official.
Kyle Busch has the pole and is looking for his second straight Cup Series victory.
Kurt Busch, who was expected to start alongside younger brother Kyle on the front row, will start at the back of the field after wrecking his primary car in practice Saturday.
Erik Jones has been strong all week in practice and is looking for his first career win in NASCAR's top series, while seven-time Cup champion Jimmie Johnson looks to snap a 30-race win drought.
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