"If we have somebody that uses less-than-great judgment when they leave their pit box, and we have an incident, then certainly we've got to make a statement by penalizing (that driver)," Barfield said. "The lines are a little bit confusing, because we don't go in and change the lines everywhere we go.
"There's a different angle, if you looked at, you can see the difference between the Target and the Verizon signs on the wall. With the No. 9 car (Dixon) leaving the pit lane, he clearly crosses right into the pit box into the No. 12 car (Power) space, and that's where the violation occurred."
Dixon's team saw it differently.
"The guy turned his back and carried the tire into Dixon's side," Chip Ganassi Racing team manager Mike Hull said. "He walked into us, so if that sets the precedent, in the next race, that means somebody can walk into us with a tire in their hand."
All three crew members were fine to continue after a bit of ice.
Dixon's penalty dropped him 19 seconds behind Power into 21st, and Power carefully maintained his lead for a victory on the same course where he was seriously injured four years ago, forcing him to miss the rest of the season.
"I think they're way overplaying this thing, as far as I'm concerned," Penske said. "Someone got hit, went up in the air. Obviously, the 9 car was too close to our crew, had an accident there. The outcome is obvious."
Dixon's brush with Power's crew highlighted an uncommonly eventful race in Sonoma, a twisty road course that usually doesn't allow much drama or passing.
Penske got into a finger-pointing argument post-race with Marco Andretti, who made contact with Power late in the race. Third-place finisher Dario Franchitti was mad at Team Penske, feeling Power drove him off the track with no penalty.
Justin Wilson was second. Castroneves finished behind Marco Andretti, Simon Pagenaud and Ryan Hunter-Reay.
With strong wind and dust all over the course, the race featured a record seven cautions for various collisions and stalls. Sebastian Saavedra crashed heavily into a barrier with four laps to go.
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