MONTEREY -- Marc Marquez continues to prove that he is no ordinary rookie.

The 20-year-old MotoGP phenom remained perfect in the United States, winning the Red Bull U.S. Grand Prix on Sunday in front an announced crowd of 46,256 at Mazda Raceway Laguna Seca.

Stefan Bradl, the pole winner, finished second for the first podium of his career and Valentino Rossi was third.

Marquez, who leads the championship standings, had previously won in his only other MotoGP race in the United States, winning the Grand Prix of The Americas in Austin, Texas, in April.

In nine races this season, Marquez has won three times with eight podium finishes. One of the keys to Sunday's victory was Marquez's ability to quickly familiarize himself with a track where he had never raced.

"It takes time to learn where all the bumps are," he said. "Yesterday I found a lot of bumps in the corner where I crashed. But today in the beginning I was a little bit scared because we knew with the bumps it would be so easy to lose the front."

Marquez started second, but was passed on the start by Rossi, who rocketed past from fourth on the grid. But Marquez came right back and made the move of the race to regain second place.

On Lap 4, he passed Rossi in The Corkscrew, going onto the dirt on the right-turn portion of the world-famous downhill chicane. It was reminiscent of Rossi's pass of Casey Stoner in 2008.

If Rossi has the patent on that move, Marquez says he will be glad to compensate for any infringement.

"I will pay the copyright," Marquez said.

Rossi didn't have enough to come back at Marquez and spent the rest of his race holding off Alvaro Bautista.

"It was not the right day to fight with Marc, because Marc was too fast for me," Rossi said.

Bradl was next in Marquez's sights, and he finally got him on Lap 19, making the pass coming out of Turn 11. Marquez was not challenged for the rest of the 32-lap race over the 2.238-mile, 11-turn road course.

Bradl, whose best previous career finish was fourth, was pleased with his day.

"It's a great result for us," he said. "Of course expectations were high after the pole position yesterday, but I knew I had good speed and I could be fast from the beginning."

Marquez extended his lead in the championship standings to 16 points over Dani Pedrosa, who finished fifth, and 26 points over Jorge Lorenzo, who was sixth.

After missing last week's German Grand Prix, Pedrosa and Lorenzo raced Sunday despite left collarbone fractures. Their absences at the Sachsenring opened the door for Marquez to take the points lead when he won. With his closest competition still ailing Sunday, Marquez took advantage with another win, which made him the youngest rider to score back-to-back victories.

"It was a big moment to open a gap in the championship," Marquez said. "We need to continue like that, go 100 percent race by race."

  • Bradl, making only his second start at Laguna Seca, did not get any fatherly advice from Helmut Bradl, a multiple race winner in the 250cc class in the 1980s and '90s.

    "No, because he was always so slow at Laguna Seca," Stefan Bradl said. "He didn't like this track. When we went around the track together he said, 'At this corner I was slow, and this corner I was not fast.'"…"

  • Points leader Josh Hayes ended his "slump," winning the AMA National Guard SuperBike race. Hayes, riding for Monster Energy Graves Yamaha, had won five in a row until finishing second in his last event. Josh Herrin, Hayes' teammate, was second and Martin Cardenas was third.

  • Cameron Beaubier of Roseville pulled away from the field on a restart and won the AMA Daytona SportBike race.

    The race was shortened from 20 laps to 14 after a red flag came out when Ted Rich crashed coming out of Turn 11 on Lap 9. Rich went over the handlebars and slid up the main straight backward on his hands and knees.

    He walked away from the incident and gave a double thumbs-up.

    Garrett Gerloff was second and Jake Gagne third.

  • There was a moment of silence for Italian rider Andrea Antonelli, who was killed Sunday in a World Supersport race in Moscow. Antonelli lost control of his bike in the rain and crashed, then was struck by another rider.

    Contact Darryl Matsuda at 408-920-5215. Follow him on Twitter at twitter.com/DarrylMatsuda.