Heavy rain hit the track Sunday morning. It let up about an hour before the 2 p.m. start and the sky brightened for driver introductions. The rain returned about 3:30 and soaked the surface again. There was light rain the rest of the afternoon, forcing the postponement.
Three-time defending champion Jimmie Johnson was to be among a group of NASCAR drivers to be honored at the White House by President Barack Obama on Monday.
Tony Stewart lost his pole position and will now start from the back of the pack after wrecking his car during practice on Saturday for the Pennsylvania 500.
Stewart lost control of his No. 14 Chevrolet on a turn on the second lap of Saturday's first practice run and spun into the wall. He was unhurt in the crash.
His Stewart-Haas Racing crew quickly got to work on the backup. Stewart leads the points standings and was the pole sitter at Pocono because rain washed out Friday's qualifying.
"I just screwed up," Stewart said. "I got in too deep and got loose and couldn't save it."
The same scenario happened to Stewart in June's race at Pocono when he took the pole after a rainout and wrecked in practice. Then he went out and won on Sunday in his backup from the rear of the field.
He'll have to pass 42 other cars again to really duplicate the feat.
"I know we can do it," Stewart said. "I tore up a really good race car today."
Stewart, 192 points ahead of Johnson in the points standings, is one of four drivers to win a Cup race this season from the rear of the field. He's trying to become the third driver since 2004 to sweep the two Pocono races
Stewart's June win at Pocono made him the first owner/driver to win a race since Ricky Rudd at Martinsville in 1998.
