Villopoto suffered through yet another disappointing outing, crossing the finish line in sixth and only narrowly edging Brayton and Barcia's teammate, Trey Canard, for the position.

WATCH: Villopoto Wins Heat Race

Andrew Short continued his string of competitive results since being forced into team ownership as his squad crumbled around him with a ninth-place run. Mike Alessi rounded out the top ten to complete a Suzuki bookending of the top ten.

Millsaps now boasts an imposing 19-point advantage over Dungey following six races of the 2013 Monster Energy Supercross Championship. Villopoto and Canard are tied for third, some 27 points back.

The developing title fight picks right back up next weekend as the series travels to Arlington, Texas.

WATCH: San Diego Analysis

450SX Class Results: San Diego

Davi Millsaps, Murrieta, Calif., Suzuki
Justin Barcia, Ochlocknee, Ga., Honda
Ryan Dungey, Belle Plaine, Minn., KTM
James Stewart, Haines City, Fla., Suzuki
Chad Reed, Australia, Honda
Ryan Villopoto, Poulsbo, Wash., Kawasaki
Justin Brayton, Fort Dodge, Iowa, Yamaha
Trey Canard, Shawnee, Okla., Honda
Andrew Short, Smithville, Texas, Honda
Mike Alessi, Victorville, Calif., Suzuki

450SX Class Points

Davi Millsaps, Murrieta, Calif., Suzuki, 132
Ryan Dungey, Belle Plaine, Minn., KTM, 113
Ryan Villopoto, Poulsbo, Wash., Kawasaki, 105
Trey Canard, Shawnee, Okla., Honda, 105
Chad Reed, Australia, Honda, 97
Justin Barcia, Ochlocknee, Ga., Honda, 83
Andrew Short, Smithville, Texas, Honda, 83
James Stewart, Haines City, Fla., Suzuki, 74
Justin Brayton, Fort Dodge, Iowa, Yamaha, 67
Broc Tickle, Holly, Mich., Suzuki, 57