When you win your first NASCAR Sprint Cup Series race, it doesn't really matter much how you win.  That is no doubt the philosophy of Chris Buescher, who made a race-winning gamble that weather was going to shorten Monday's already rain-delayed Pennsylvania 400 at Pocono Raceway.  Buescher was rewarded for staying out on the track when most of the rest of the field pitted with 28 laps to go, as fog enveloped the 2.5-mile track and eventually brought out the caution. After running six laps under caution, NASCAR brought the field to pit road and brought out a red flag with 22 to go.  Buescher promptly began hoping and praying -- and dancing -- that he would not have to take to the track again to finish the race.  "I'm just trying to remember every rain dance I've ever learned," Buescher said over his radio shortly after bringing his car to pit road for what indeed did turn out to be the final time when NASCAR eventually called the race.  Buescher did not even care that it was fog, not rain, that contributed most to putting a merciful end to the race that originally was scheduled to be run a day earlier on Sunday, and then was delayed another 37 minutes before the green flag finally waved on Monday.  "It's a tough way to end the race for a lot of people," Buescher admitted. "But it's a great way for us."  It gave the rookie the first Sprint Cup win of his career in a huge upset. It also was the first win for Front Row Motorsports in 119 races, since David Ragan scored their only other one at Talladega in 2013.  The middle of the race was marked by the beginning of a spirited battle for the lead between the No. 42 Chip Ganassi Chevrolet of Kyle Larson and the No. 3 Richard Childress Racing Chevy of Austin Dillon. Both drivers anticipated that rain might be on the way as the race approached the halfway point on Lap 80 that would make it official.  But as they dueled for the lead, Dillon got up into Larson just enough for Joey Logano, who was running third at the time, to pass both of them for the lead -- just before a caution came out for rain.  The light mist did not last, however, and the race went green again on Lap 92.  It wasn't long after that before Logano encountered trouble of his own that circumvented his once-promising day when he and rookie Chase Elliott wrecked.  Larson and Dillon again cycled back to the front and waged another entertaining battle for the lead before Larson pitted with 35 to go, giving up the lead. Dillon waited a little longer before pitting and then suffered through a slow stop, coming back on the track in 13th, which is where he ultimately finished.  By then it was Keselowski's turn to lead after he pitted out of sequence from most of the rest of the field in his No. 2 Team Penske Ford.  That allowed Keselowski to stay out along with Buescher and a handful of others, while most everyone else decided to pit just before fog hit.  Buescher didn't go with the majority of the crowd, and the 2015 XFINITY Series champion was rewarded handsomely for it in the end. He was followed in the finishing order by Keselowski, Regan Smith with a season-high finish for Tommy Baldwin Racing, Kevin Harvick, Tony Stewart and Larson.  The day did not go nearly as well for many others, including Martin Truex Jr. He started from the pole, but saw his hopes for victory dashed early on in the proceedings.  Shortly after a Lap 20 restart following a competition caution, Truex's No. 78 Furniture Row Racing Toyota appeared to be smoking on the right front and then abruptly crashed in the Tunnel Turn of the three-turn track.  "Just blew a right front (tire)," Truex said. "A lug nut bounced off the ground, fell in behind the wheel behind a pit stop. It's just bad luck honestly."  Truex said he felt something wrong as he worked through Turns 1 and 2, but then thought it was going to be fine before disaster struck in the Tunnel Turn.  "By the time I let off and tried to slow down it was just going straight for the fence," Truex said.  His day only got worse from there, as he lost two more right-front tires to bring out cautions before the race was 100 laps old.  Buescher, meanwhile, had to overcome some early issues to put himself in postion for the win. He had to pit out of sequence to fix a left-rear tire rub at one point, and also had to fight back after a pit-road speeding penalty.  The victory puts Buescher in postiion to crash the Chase for the Sprint Cup playoff party. But first he will have to move within the top 30 in the points standings, as he's still six points out of 30th after Monday's win.  "This is gonna change our whole year right here," Buescher said.
The Sprint Cup rookie scores his first victory in NASCAR's top series when fog cuts Monday's Pennsylvania 400 short at Pocono Raceway.