EDMONTON, Alberta -- Helio Castroneves has been quietly lurking in the championship race this season, taking advantage of mistakes by others to position himself for a run at the IndyCar Series title.
After his win Sunday at Edmonton, everybody knows he's in the mix for his first career championship. Everybody also knows he's going to be tough to beat down the stretch.
"We are always there, maybe playing a little bit quiet and silent, which I like, because many, many more years we were aggressive," Castroneves said. "Continuing to work in that low profile, and in the end of the day at (the season ending race) Fontana, that's the day it counts."
Castroneves thrust himself into the championship race with his second victory of the season. The Brazilian relied on pit strategy from his Penske Racing crew to take the lead, then held off hard-charging Takuma Sato over the final 15 laps to pick up the win.
The win, in the first caution-free race of the season, snapped Hunter-Reay's three-race win streak.
"We're never out," he said. "We're always in the battle for the championship since we started. Now we're closer and we're taking the opportunities that when we run very well, we take advantage of it."
Castroneves said when his engineer called him into the pits for an early stop, he wasn't sure the strategy was correct. But it worked, and the 37-year-old finally broke through at Edmonton, where he had finished second three times in the past four races. In 2010, he took the checkered flag, only to be stripped of the win for blocking Power.
"It's my second win here," he said. "Maybe some people would disagree with me, that it's not my second win. We have to turn the page. I'm never going to forget what happened, but I certainly got to move on. Today was a great day, so we realize and finally can say we won here.
"We've always been quick, we've always been there, but today we certainly won."
Castroneves has put together a season full of good days, and it's made him a threat for his first career championship.
He's got two wins, three podium finishes and has been outside the top 10 only twice in 11 races. Castroneves has also finished on the lead lap in all but three races.
"He's stronger than ever this year," Power said. "He's been really consistent on days that he can't win. When he can win, he absolutely executes. He's strong, Hunter-Reay is strong.
"Man, it's going to be a fight to the very end. Helio is definitely doing a good job. He's going to be tough to beat."
Leader Alex Tagliani pitted after Castroneves, who had to push to maintain track position after his stop. He slid by the exit to pit lane seconds before Tagliani made it back onto the track, with Sato right behind Tagliani.
Power had been the leader, gave it up to make his late pit stop, and Castronves moved to the lead. Sato got by Tagliani and worked the final 15 laps, to no avail, to catch Castroneves.
He instead settled for a career-best second-place finish, which team owner Bob Rahal jokingly predicted as he watched Sato try to chase down Castroneves.
"Helio is tough," Rahal said. "He starts blocking when he picks up his rental car at the airport."
Sato was pleased with his finish even though he never had a clear shot to attempt a pass for the lead.
"I should have enjoyed it a little bit more if I could overtake, we were not quite yet there," he said. "He did a great job, no mistake at all. I couldn't push him any harder than that. To be honest, simply there was not enough opportunity."
Castroneves said Sato's hard charge was the best thing for him because it forced him to stay focused over the closing laps.
"Those circumstances for me, it's actually best," he said. "You can't miss with concentration, you have to be on it every step of the way."
Power wound up third -- his best finish since his win at Brazil in April -- and said he was happy with the result. An engine change after qualifying cost Power 10 spots on the starting grid, so he came from 17th to finish third -- his fourth podium finish at Edmonton in four years.
Although he dropped a spot in the standings, his deficit was cut from 35 points to 26.
"If I thought that the race would go fully green starting 17th, I would have taken third any day," Power said.
But there was some drama at play as Hunter-Reay believed Power should have been penalized by IndyCar for cutting him off as Power exited pit lane earlier in the race. Power said he believed he had executed the move exactly how race director Beaux Barfield explained it Saturday morning.
"Well, I thought in the driver meeting if you are not cutting someone off, you can take the apex, and I thought I was in front of him because I didn't see him," Power said. "But if I was in his position, I guess I would scream for a penalty, too, because that's more points.
"If that was the case, my mistake."
Hunter-Reay, who won the pole but started 11th because of an engine change, was adamant on his radio that Power had broken the rule. And he was furious when no penalty was called after a review by race control.
"You've got to be kidding me. That is absolutely... ridiculous," he yelled.
He finished seventh, and still didn't agree with the ruling after the race.
"I expected it to be called, I expected him to be thrown off, but it didn't happen," he said.
Although he managed a top-10 finish, he wasn't pleased because Castroneves and Power gained ground.
"We didn't lose too much, I guess, but when two guys who are fighting for the championship finish on the podium, it is not very satisfying," Hunter-Reay said. "We have a lot of racing to go, we need to be strong across the board. This was definitely a bruise today, but it didn't knock us down, by any means."
Graham Rahal finished fourth and was followed by crowd favorite Tagliani, who took the lead on the first lap by passing Dario Franchitti and led 49 laps en route to his best finish of the season and best of his career at Edmonton.
"I thought it was our chance to get in the lead and try to see if we could control the race, and our car was very strong on saving fuel early," Tagliani said. "We just missed it at the end. We didn't have the pace that the guys were running at the front. Nevertheless, fantastic result."