HOUSTON -- Ryan Villopoto wrapped up his second straight AMA Supercross season title Saturday night, racing to his eighth victory in the first 13 rounds of the season.

Villopoto, the Kawasaki star from Poulsbo, Wash., held off Davi Millsaps in front of 48,962 fans at Reliant Stadium. Villopoto has a 104-point lead over KTM's Ryan Dungey, sidelined by a broken collarbone.

"It's huge," Villopoto said. "There is a lot of hard work that went into this, and I am only one piece of the pie. The whole Monster Energy Kawasaki team has worked very hard all year to help me make this happen."

KTM's Ken Roczen, from Murrieta, Calif., won the Western Regional Supercross Lites race.

Supercross Class

1. Ryan Villopoto, Poulsbo, Wash., Kawasaki

2. Davi Millsaps, Murrieta, Calif., Yamaha

3. Jake Weimer, Rupert, Idaho, Kawasaki

4. Mike Alessi, Hillard, Fla., Suzuki

5. Justin Brayton, Murrieta, Calif., Honda

6. Robert Kiniry, Holland Patent, NY, Yamaha

7. Broc Tickle, Holly, Mich., Kawasaki

8. Nico Izzi, Menifee, Calif., Yamaha

9. Weston Peick, Wildomar, Calif., Kawasaki

10. Josh Grant, Corona, Calif., Kawasaki

Supercross Class Season Standings

1. Ryan Villopoto, Poulsbo, Wash., Kawasaki -- 296

2. Ryan Dungey, Belle Plaine, Minn., KTM -- 192

3. Davi Millsaps, Murrieta, Calif., Yamaha -- 191

4. Justin Brayton, Murrieta, Calif., Honda -- 181

5. James Stewart, Haines City, Fla., Yamaha -- 178

6. Jake Weimer, Rupert, Idaho, Kawasaki -- 170

7. Kevin Windham, Centreville, Miss., Honda -- 166

8. Brett Metcalfe, Lake Elsinore, Calif., Suzuki -- 154

9. Mike Alessi, Hilliard, Fla., Suzuki -- 154

10. Chad Reed, Dade City, Fla., Honda -- 128

Eastern Regional Supercross Lites Class

1. Ken Roczen, Murrieta, Calif., KTM

2. Justin Barcia, Ochlocknee, Ga., Honda

3. Blake Baggett, Grand Terrace, Calif., Kawasaki

4. Blake Wharton, Pilot Point, Texas, Suzuki

5. Phillip Nicoletti, Cochecton, NY, Honda

6. Alex Martin, Millville, Minn., Honda

7. Jake Canada, Sun City, Calif., Honda

8. Darryn Durham, Butler, Pa, Kawasaki

9. Justin Bogle, Cushing, Okla., Honda

10. Matthew Lemoine, Collinsville, Texas, Kawasaki

Eastern Regional Supercross Lites Class Season Standings

1. Justin Barcia, Ochlocknee, Ga., Honda -- 167

2. Blake Wharton, Pilot Point, Texas, Suzuki -- 135

3. Ken Roczen, Murrieta, Calif., KTM -- 127

4. Darryn Durham, Butler, Pa., Kawasaki -- 118

5. Blake Baggett, Grand Terrace, Calif., Kawasaki -- 106

6. Jake Canada, Sun City, Calif., Honda -- 104

7. Justin Bogle, Cushing, Okla., Honda -- 87

8. Alex Martin, Millville, Minn., Honda -- 65

9. Matthew Lemoine, Collinsville, Texas, Kawasaki -- 57

10. Malcolm Stewart, Haines City, Fla., KTM -- 55