Brad Parrott, a 19-time winning crew chief in NASCAR national series competition, has joined NASCAR.com as a guest writer for the 2014 season. Join us as he provides instant in-race analysis for Sunday's Pocono 400 at Pocono Raceway while using tools on RaceView, including pit stats, driver telemetry and listening in on scanner sounds:
Also review his in-race chat to review all the questions and analysis during Sunday's 400-miler.
RELATED: Race Center | Series standings
FIRST QUARTER (Laps 1-40)
Key Moment: Brad Keselowski's jump at the drop of the green flag got him up in clean air and helped his No. 2 Ford lead almost all of the first 100 miles. ... Also, Matt Kenseth damaged his front end by running into the back of Jamie McMurray's No. 1, which has ruined the chances of a pre-race contender.
Key Move: Clint Bowyer had the biggest jump from the green flag, moving up nine spots as crew chief Brian Pattie had the No. 15 Michael Waltrip Racing Toyota dialed in to start the race. Hendrick Motorsports teammates Jimmie Johnson (nine spots) and Kasey Kahne (eight spots) also made strides in the first 100 miles.
SECOND QUARTER (Laps 41-80)
Key Moment: Jimmie Johnson's No. 48 car spun shortly after leaving his pit box on Lap 72, making contact with the No. 9 of Marcos Ambrose on pit road. Johnson righted the car, put it in reverse, and got left-side tires to go with his new right-sides. By the time it was over, Johnson dropped 18 positions on pit road.
Key Pit Stop: The second caution period, starting on Lap 59, shuffled the running order during a cycle of green-flag pit stops. The off-cycle stop left Denny Hamlin and other contenders pushed back in the running order.
Key Move: Tony Stewart pushed through to the lead in Lap 76, showing the strength of the Stewart-Haas Racing team. At the halfway point, the SHR cars with Stewart, Kurt Busch and Harvick ran 1-2-3 with Danica Patrick in 12th.
THIRD QUARTER (Laps 81-120)
Key Moment: Kevin Harvick's flat left-front tire in Lap 117 forced the Pocono contender in for an unscheduled pit stop. A caution flag for oil on the track immediately following his stop could have minimized the misfortune for the No. 4 team, but another flat -- this time, the right-rear -- pushed Harvick deep down the leaderboard for the home stretch.
Key Pit Stop: Trouble on the left-front tire change cost the No. 41 team of Kurt Busch with a 15.3-second stop. Once the cycle of green-flag stops worked through, Busch dropped from second in the running order to fourth.
Key Move: Crew chief Chad Knaus has helped Jimmie Johnson rebound from his earlier gaffe with the way cautions fell. After the shuffling, the No. 48 Chevy was back up to ninth with 40 laps remaining.
FOURTH QUARTER (Laps 121-160)
Key Moment: Trash on Brad Keselowski's grille changed the complexion of the home stretch. His decision to try to clear the debris off allowed Dale Earnhardt Jr. to scoot by and lead the final five laps.
Key Pit Stop: Crew chief Steve Letarte opted for four tires for Dale Earnhardt Jr. on Lap 131. Going for four tires instead of two paid off for the front-runners -- the top four finishers all made the same call.
Key Move: Opportunity knocked for Dale Jr. and Keselowski's move to try to clear his grille wound up being costly. Did Danica Patrick affect the outcome in favor of a Chevy teammate and a Hendrick engines customer? Whether purposely or inadvertently, she was a player in the final plot twist.